diff --git a/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/README.md b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/README.md
new file mode 100644
index 000000000..c643ed227
--- /dev/null
+++ b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/README.md
@@ -0,0 +1,85 @@
+# ZBX_Disk_Stat
+Send statistic from /proc/diskstats to Zabbix
+
+This is small project for my Home server
+
+# Source
+[github: dusharu/ZBX_Disk_Stat](https://github.com/dusharu/ZBX_Disk_Stat)
+
+
+# Features
+  * AutoDiscovery BlockDev and Filter by [LLD Override](https://www.zabbix.com/documentation/current/manual/discovery/low_level_discovery#override) 
+  * Collect Read\Write Operations per second
+  * Collect Read\Write Sectors per second
+  * Calculate Time for 1 Read\Write Operations
+    * Trigger when IO_Time >30ms at 10 times per 20min
+  * Collect IO Queue
+  * Convert DM(Device Mapper) device to pretty Name
+    * Get stat for `dm-1` but print for user `vg00-lv_root`
+    * After reboot `dm-1` may change to `dm-2`, but stat will be correct
+
+# Requires
+
+# Install
+  1. Add script to server
+
+```
+# Create dir for zabbix sript
+mkdir -p /usr/libexec/zabbix/
+
+# Copy script to your server
+curl 'https://raw.githubusercontent.com/dusharu/ZBX_Disk_Stat/master/scripts/disk_stat.sh' -o /usr/libexec/zabbix/disk_stat.sh
+chmod 755 /usr/libexec/zabbix/disk_stat.sh
+```
+  2. [Import](https://www.zabbix.com/documentation/current/ru/manual/xml_export_import) [Template_ZBX/ZBX_Disk_Stat.xml](ZBX_Disk_Stat.xml)
+  3. Check [LLD Override](https://www.zabbix.com/documentation/current/manual/discovery/low_level_discovery#override). Default value:
+     * ^$ - result FALSE - device was remove
+     * .*snapshot.* - result FALSE - filter LVM snapshot
+     * -real$ - result FALSE - [filter LVM snapshot](https://rwmj.wordpress.com/2010/09/28/how-lvm-does-snapshots/)
+     * -cow$ - result FALSE - [filter LVM snapshot](https://rwmj.wordpress.com/2010/09/28/how-lvm-does-snapshots/)
+     * ^xvd[a-z]*[0-9]+$ - result FALSE - filter partitions
+     * ^[hs]d[a-z]*[0-9]+$ - result FALSE - filter partitions
+     * ^loop[0-9]*$ - result FALSE - filter loop device
+     * ^sr[0-9]*$ - result FALSE - filter CD-ROM
+  4. Add host to group "Disk_Stat: io_block_dev"
+  5. Wait before Zabbix Discovery and Get Some Data
+
+
+# Screenshoot
+Graph create by [Grafana](https://grafana.com/) and [Zabbix plugin](https://grafana.com/grafana/plugins/alexanderzobnin-zabbix-app)
+![1-Disk_Stat_IOPS.png](files/1-Disk_Stat_IOPS.png)
+![2-Disk_Stat_RW_Sectors.png](files/2-Disk_Stat_RW_Sectors.png)
+![3-Disk_Stat_IO_time.png](files/3-Disk_Stat_IO_time.png)
+![4-Disk_Stat_IO_Queue.png](files/4-Disk_Stat_IO_Queue.png)
+
+Graph create by Zabbix
+![10-Disk_Stat_IOPS_zbx.png](files/10-Disk_Stat_IOPS_zbx.png)
+![11-Disk_Stat_IO_Queue_zbx.png](files/11-Disk_Stat_IO_Queue_zbx.png)
+![12-Disk_Stat_RW_Sectors_zbx.png](files/12-Disk_Stat_RW_Sectors_zbx.png)
+
+
+# Debug Command
+## Print HELP
+```
+zabbix_get -s <HOST> -k 'system.run[ "/usr/libexec/zabbix/disk_stat.sh" ]'
+```
+## Discovery
+```
+zabbix_get -s <HOST> -k 'system.run[ "/usr/libexec/zabbix/disk_stat.sh blkdev_discovery" ]'
+```
+## Get statistic
+```
+zabbix_get -s <HOST> -k 'system.run[ "/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat <DISK>" ]'
+```
+
+
+# Docs
+  1. [kernel.org: Describe /proc/diskstats](https://www.kernel.org/doc/Documentation/ABI/testing/procfs-diskstats)
+  2. [kernel.org: I/O statistics fields](https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst)
+  3. [Wikipedia.org: maximum IOPS on different Disk](https://en.wikipedia.org/wiki/IOPS)
+  4. [RAID calcuator](https://wintelguy.com/raidperf.pl)
+  5. [Linux Filesystem Hierarchy Standard: /usr/libexec](https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s07.html)
+
+# ToDo
+  1. Add link with information about maximum IO_time
+  2. Add plugin for zabbix_agent2
diff --git a/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/ZBX_Disk_Stat.yaml b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/ZBX_Disk_Stat.yaml
new file mode 100644
index 000000000..42cfd2fd6
--- /dev/null
+++ b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/ZBX_Disk_Stat.yaml
@@ -0,0 +1,494 @@
+zabbix_export:
+  version: '5.4'
+  date: '2022-04-10T08:45:50Z'
+  groups:
+    -
+      uuid: 64f54166a4c84403b4d8cce5896d71ab
+      name: io_block_dev
+  templates:
+    -
+      uuid: e19f5e5855094aac8c4e3fd8b4d70aa8
+      template: io_block_dev
+      name: Disk_Stat
+      description: |
+        Parse /proc/diskstats
+        https://www.kernel.org/doc/Documentation/ABI/testing/procfs-diskstats
+        
+        Need script: /usr/libexec/zabbix/disk_stat.sh
+        
+        
+        More infomation in github:
+        https://github.com/dusharu/ZBX_Disk_Stat
+      groups:
+        -
+          name: io_block_dev
+      discovery_rules:
+        -
+          uuid: b747da8902084de89248006a2f5fb4c7
+          name: get_block_dev
+          key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_discovery]'
+          delay: 1800s
+          filter:
+            evaltype: AND
+            conditions:
+              -
+                macro: '{#DEVBLK}'
+                value: '.*'
+                formulaid: A
+          description: |
+            Discovery block dev from /proc/diskstats.
+            DM(Device Mapper) device transform from dm-XX to link name in /dev/mapper/
+          item_prototypes:
+            -
+              uuid: 646e0e2043024013b19af48312d44ab1
+              name: 'IO_queue on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.io_queue[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                I/Os currently in progress
+                The only field that should go to zero. Incremented as requests are given to appropriate struct request_queue and decremented as they finish.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''io_queue'']'
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: 56964eb0d1684865b364b877e1af3b95
+              name: 'Read_IO_time on $1'
+              type: CALCULATED
+              key: 'custom.blkdev.read_io_time[{#DEVBLK}]'
+              delay: 60s
+              history: 30d
+              value_type: FLOAT
+              units: ms
+              params: |
+                last(//custom.blkdev.read_sum_time_pm[{#DEVBLK}])/
+                (last(//custom.blkdev.read_operation_pm[{#DEVBLK}])+count(//custom.blkdev.read_operation_pm[{#DEVBLK}],#1,"eq","0"))
+              description: 'Time for one Read Operation'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+              trigger_prototypes:
+                -
+                  uuid: 57903a8e652d48bfa526db35a2482661
+                  expression: 'count(/io_block_dev/custom.blkdev.read_io_time[{#DEVBLK}],#20,"ge","30")>10'
+                  name: 'Read_IO_time on {#DEVBLK} is critically big'
+                  priority: AVERAGE
+                  description: |
+                    <10ms - Awesome
+                    10ms-30ms - OK
+                    >30ms - BAD for typical Disk usage
+                    
+                    Not use this metric for Backup Disk
+            -
+              uuid: 16f484305f6c47c59c85691851ac4c63
+              name: 'Read_operation_per_min on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.read_operation_pm[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                
+                This is the total number of reads completed successfully.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''read_complete'']'
+                -
+                  type: SIMPLE_CHANGE
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: f0b50166177b4f0293def17f8c207858
+              name: 'Read_operation_per_sec on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.read_operation_ps[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              value_type: FLOAT
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                
+                This is the total number of reads completed successfully divided by total second.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''read_complete'']'
+                -
+                  type: CHANGE_PER_SECOND
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: df381b21e01041a2b52757864f2739e4
+              name: 'Read_sectors_per_sec on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.read_sectors_ps[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              value_type: FLOAT
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                
+                This is the total number of sectors read successfully  divided by total second.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''read_sector'']'
+                -
+                  type: CHANGE_PER_SECOND
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: 7eaf4ece64c54d018603848d2cb90fdb
+              name: 'The total number of milliseconds spent by all reads on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.read_sum_time_pm[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                
+                This is the total number of milliseconds spent by all reads (as measured from __make_request() to end_that_request_last()).
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''read_time'']'
+                -
+                  type: SIMPLE_CHANGE
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: aee254f8516e454bb721f200b9c404bc
+              name: 'Write_IO_time on $1'
+              type: CALCULATED
+              key: 'custom.blkdev.write_io_time[{#DEVBLK}]'
+              delay: 60s
+              history: 30d
+              value_type: FLOAT
+              units: ms
+              params: |
+                last(//custom.blkdev.write_sum_time_pm[{#DEVBLK}])/
+                (last(//custom.blkdev.write_operation_pm[{#DEVBLK}])+count(//custom.blkdev.write_operation_pm[{#DEVBLK}],#1,"eq","0"))
+              description: 'Time for one Write Operation.'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+              trigger_prototypes:
+                -
+                  uuid: 57e4554ca12a4b4eaf51f777d5660606
+                  expression: 'count(/io_block_dev/custom.blkdev.write_io_time[{#DEVBLK}],#20,"ge","30")>10'
+                  name: 'Write_IO_time on {#DEVBLK} is critically big'
+                  priority: AVERAGE
+                  description: |
+                    <10ms - Awesome
+                    10ms-30ms - OK
+                    >30ms - BAD for typical Disk usage
+                    
+                    Not use this metric for Backup Disk
+            -
+              uuid: d7cc189d85f44997aba400bd6bbb6087
+              name: 'Write_operation_per_min on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.write_operation_pm[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                This is the total number of writes completed successfully.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''write_complete'']'
+                -
+                  type: SIMPLE_CHANGE
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: 870df6f7bd704e7bbdd0fadaaafc154b
+              name: 'Write_operation_per_sec on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.write_operation_ps[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              value_type: FLOAT
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                This is the total number of writes completed successfully divided by total second.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''write_complete'']'
+                -
+                  type: CHANGE_PER_SECOND
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: 3dae9ed472c6455bb742a3784cc6079c
+              name: 'Write_sectors_per_sec on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.write_sectors_ps[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              value_type: FLOAT
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                This is the total number of sectors written successfully divided by total second.
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''write_sector'']'
+                -
+                  type: CHANGE_PER_SECOND
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: 910b2c7c32fa45b5a7dab2149fb688c9
+              name: 'The total number of milliseconds spent by all writes on $1'
+              type: DEPENDENT
+              key: 'custom.blkdev.write_sum_time_pm[{#DEVBLK}]'
+              delay: '0'
+              history: 30d
+              description: |
+                https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+                This is the total number of milliseconds spent by all writes (as measured from __make_request() to end_that_request_last()).
+              preprocessing:
+                -
+                  type: JSONPATH
+                  parameters:
+                    - '$[''ZBX_Disk_Stat''][0][''write_time'']'
+                -
+                  type: SIMPLE_CHANGE
+                  parameters:
+                    - ''
+              master_item:
+                key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+            -
+              uuid: 76805b5fc1b64ee49a0f6ebe69f5ef68
+              name: 'All_stat on $1'
+              key: 'system.run[/usr/libexec/zabbix/disk_stat.sh blkdev_all_stat {#DEVBLK}]'
+              delay: 60s
+              history: '0'
+              trends: '0'
+              value_type: TEXT
+              description: |
+                JSON raw data
+                Describe in https://www.kernel.org/doc/Documentation/admin-guide/iostats.rst
+              request_method: POST
+              tags:
+                -
+                  tag: Application
+                  value: io_block_dev
+          graph_prototypes:
+            -
+              uuid: e70ed52043504d1c8a09e9d9563512ef
+              name: 'IOPS on {#DEVBLK}'
+              graph_items:
+                -
+                  color: '000066'
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.read_operation_ps[{#DEVBLK}]'
+                -
+                  sortorder: '1'
+                  color: 3333FF
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.write_operation_ps[{#DEVBLK}]'
+                -
+                  sortorder: '2'
+                  color: 1A7C11
+                  yaxisside: RIGHT
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.read_io_time[{#DEVBLK}]'
+                -
+                  sortorder: '3'
+                  color: 66FF66
+                  yaxisside: RIGHT
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.write_io_time[{#DEVBLK}]'
+            -
+              uuid: 6e3f56fafb4c40cfae38c9a83d1959cb
+              name: 'IO_queue on {#DEVBLK}'
+              graph_items:
+                -
+                  color: '000066'
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.io_queue[{#DEVBLK}]'
+                -
+                  sortorder: '1'
+                  color: 1A7C11
+                  yaxisside: RIGHT
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.read_io_time[{#DEVBLK}]'
+                -
+                  sortorder: '2'
+                  color: 66FF66
+                  yaxisside: RIGHT
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.write_io_time[{#DEVBLK}]'
+            -
+              uuid: feb8451d097b4f25bf3cfecd08715d44
+              name: 'Read\Write sectors(512bytes) on {#DEVBLK}'
+              graph_items:
+                -
+                  color: '000066'
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.read_sectors_ps[{#DEVBLK}]'
+                -
+                  sortorder: '1'
+                  color: 3333FF
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.write_sectors_ps[{#DEVBLK}]'
+                -
+                  sortorder: '2'
+                  color: 1A7C11
+                  yaxisside: RIGHT
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.read_io_time[{#DEVBLK}]'
+                -
+                  sortorder: '3'
+                  color: 66FF66
+                  yaxisside: RIGHT
+                  item:
+                    host: io_block_dev
+                    key: 'custom.blkdev.write_io_time[{#DEVBLK}]'
+          request_method: POST
+          overrides:
+            -
+              name: 'SKIP DISK'
+              step: '1'
+              stop: STOP
+              filter:
+                conditions:
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '^sr[0-9]*$'
+                    formulaid: A
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '-cow$'
+                    formulaid: B
+                  -
+                    macro: '{#DEVBLK}'
+                    value: ^$
+                    formulaid: C
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '.*snapshot.*'
+                    formulaid: D
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '-real$'
+                    formulaid: E
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '^xvd[a-z]*[0-9]+$'
+                    formulaid: F
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '^[hs]d[a-z]*[0-9]+$'
+                    formulaid: G
+                  -
+                    macro: '{#DEVBLK}'
+                    value: '^loop[0-9]*$'
+                    formulaid: H
+              operations:
+                -
+                  operationobject: ITEM_PROTOTYPE
+                  operator: REGEXP
+                  value: '.*'
+                  discover: NO_DISCOVER
+                -
+                  operationobject: TRIGGER_PROTOTYPE
+                  operator: REGEXP
+                  value: '.*'
+                  discover: NO_DISCOVER
+                -
+                  operationobject: GRAPH_PROTOTYPE
+                  operator: REGEXP
+                  value: '.*'
+                  discover: NO_DISCOVER
diff --git a/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/files/1-Disk_Stat_IOPS.png b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/files/1-Disk_Stat_IOPS.png
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diff --git a/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/files/disk_stat.sh b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/files/disk_stat.sh
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--- /dev/null
+++ b/Operating_Systems/Linux/template_ZBX_disk_stat/5.4/files/disk_stat.sh
@@ -0,0 +1,186 @@
+#!/bin/bash
+################################################################################
+#                                                                              #
+#                       Zabbix Disk_Stat monitoring                            #
+#                       mailto:dusharu17@gmail.com                             #
+#                                                                   2022.03.13 #
+################################################################################
+export PATH="$PATH:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
+
+#################### VAR
+##### EXIT_CODE
+EXIT_CODE_INVALID_INPUT_PARAMETRS=200
+EXIT_CODE_INVALID_DISK=201
+EXIT_CODE_DISK_NOT_FOUND=220 # used in functions blkdev_all_stat*
+
+
+
+#################### Function
+#######################################
+# Print Help
+# Globals:
+#   None
+# Arguments:
+#   None
+#######################################
+function PrintHelp {
+  echo "PRINT HELP:"
+  echo "$0 blkdev_discovery # return json with list of block devices"
+  echo "$0 blkdev_all_stat <sdX|vg/lv> # return json with statistic for /dev/sdX or LVM device(dev/vgX/lvX)"
+  echo
+  echo "More infomation in my github:"
+  echo "https://github.com/dusharu/ZBX_Disk_Stat"
+}
+
+
+
+#######################################
+# Discovery block devices
+# Globals:
+#   None
+# Arguments:
+#   None
+#######################################
+function blkdev_discovery {
+  # json header
+  echo -n -e "{\n\t\"data\":["
+
+  i=0
+  # shellcheck disable=SC2034  # Unused variables used for skip some items
+  while read -r MAJOR MINOR DEV OTHER; do
+    # skip invalid DEV
+    if [[ "$DEV" =~ ^[0-9]*$ ]]; then
+      # echo "skip DEV: $DEV" >&2
+      # echo "reason: Dev can't be num or empty" >&2
+      # echo "string(debug): $MAJOR $MINOR $DEV $OTHER" >&2
+      continue
+    fi
+
+    # print comma(,) for pervious line
+    ((++i))
+    if [[ "$i" -gt 1 ]]; then 
+      echo -n -e "\t},"
+    fi
+
+    # print blkdev Item Header
+    echo -n -e "\n\t\t{\t\"{#DEVBLK}\":\""
+
+    # print blkdev Item Name
+    if [[ "$DEV" =~ ^dm-[0-9]*$ ]]; then
+      lsblk -l -o Name,KNAME |\
+         grep -m 1 "\s*${DEV}$" |\
+         cut -d " " -f 1 |\
+         tr -d '\n'
+    else
+      echo -n "$DEV"
+    fi
+
+    # print blkd Item finisher
+    echo -n \"
+  done < /proc/diskstats
+
+  # json footer
+  echo -n -e "\t}\n"
+  echo -n -e "\t]\n}\n"
+}
+
+
+#######################################
+# Return Disk statistics in json
+# Globals:
+#   None
+# Arguments:
+#   DISK name;
+#######################################
+function blkdev_all_stat {
+  DISK="$1"
+  EXIT_CODE_DISK_NOT_FOUND=220
+
+  # count parametrs and make correct fields name for column utility
+  DISK_PARAMETERS_ALL='major,minor,name,read_complete,read_merge,read_sector,read_time,write_complete,write_merge,write_sector,write_time,io_queue,io_time,io_time_weight,discard_complete,discard_merge,discard_sector,discard_time,flush_request,flush_time'
+  DISK_PARAMETERS_COUNT="$(awk '{print NF; exit}' /proc/diskstats)"
+  DISK_PARAMETERS="$(echo "$DISK_PARAMETERS_ALL" | cut -d , -f "1-$DISK_PARAMETERS_COUNT" )"
+
+  # translate blk-name to dm-XX
+  if [ ! -b "/dev/$DISK" ]; then 
+    DISK="$(lsblk -l -o KNAME,Name | grep -m 1 "$DISK" |awk '{print $1}')"
+  fi
+
+  # generate json
+  if [ "$DISK" != "" ]; then 
+    # sed if end of cmd for Backward cmpability
+    # modern version of column print table-name in lower case
+    grep -m 1 " $DISK " /proc/diskstats |\
+      column \
+        --json \
+        --table-name ZBX_Disk_Stat \
+        --table-columns "$DISK_PARAMETERS" |\
+      sed -e 's/zbx_disk_stat/ZBX_Disk_Stat/g'
+  else 
+    exit "$EXIT_CODE_DISK_NOT_FOUND"
+  fi
+}
+
+
+
+#######################################
+# Return Disk statistics in json without utility column
+# This is old version and will be delete soon
+# Globals:
+#   None
+# Arguments:
+#   DISK name;
+#######################################
+function blkdev_all_stat_without_column {
+  DISK="$1"
+  EXIT_CODE_DISK_NOT_FOUND=220
+
+  # translate blk-name to dm-XX
+  if [ ! -b "/dev/$DISK" ]; then
+    DISK="$(lsblk -l -o KNAME,Name | grep -m 1 "$DISK" |awk '{print $1}')"
+  fi
+
+  # generate json
+  if [ "$DISK" != "" ]; then 
+    grep -m1 " $DISK " /proc/diskstats | awk '
+      BEGIN { printf("{\n\"ZBX_Disk_Stat\": [ {"); }
+      { 
+        printf("\n\t\"name\": \"" $3 "\","); 
+        printf("\n\t\"read_complete\": \"" $4 "\",");
+        printf("\n\t\"read_sector\": \"" $6 "\",");
+        printf("\n\t\"read_time\": \"" $7 "\",");
+        printf("\n\t\"write_complete\": \"" $8 "\",");
+        printf("\n\t\"write_sector\": \"" $10 "\",");
+        printf("\n\t\"write_time\": \"" $11 "\",");
+        printf("\n\t\"io_queue\": \"" $12 "\""); 
+      }
+      END { printf("\n\t} ]\n}"); }'
+  else
+    exit "$EXIT_CODE_DISK_NOT_FOUND"
+  fi
+}
+
+
+
+
+
+#################### MAIN
+case "$1" in
+ blkdev_discovery) blkdev_discovery ;;
+ blkdev_all_stat)
+   if [[ -n "$2" ]]; then
+     COLUMN_VERSION="$(column --version|grep -oe '[0-9\.]*')"
+     if [[ "$(echo -e "2.30\n${COLUMN_VERSION}"| sort -V | head -n 1)" == 2.30 ]]; then
+       # column version >= 2.30 and has --json option
+       # https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.30/v2.30-ReleaseNotes
+       blkdev_all_stat "$2"
+     else
+       # column version < 2.30 and doesn't have --json option
+       blkdev_all_stat_without_column "$2"
+     fi
+   else
+     echo "ERROR Unknow DISK: $2"; PrintHelp; exit "$EXIT_CODE_INVALID_DISK"
+   fi
+ ;;
+ *) echo "ERROR Unknow action: $1"; PrintHelp; exit "$EXIT_CODE_INVALID_INPUT_PARAMETRS" ;;
+esac