Zfs - Revision history

Jgutierrez6 at 01:49, 20 November 2024

2024-11-20T01:49:22Z

2024-10-25T17:42:50Z

Troubleshooting

← Older revision		Revision as of 17:42, 25 October 2024
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	$ '''sudo ledctl normal=/dev/disk/by-id/<disk id>'''		$ '''sudo ledctl normal=/dev/disk/by-id/<disk id>'''
	Example: $ '''sudo ledctl normal=/dev/disk/by-id/scsi-35000c500a7db39db'''		Example: $ '''sudo ledctl normal=/dev/disk/by-id/scsi-35000c500a7db39db'''

			== Check if pool is compressed ==
			<source>
			zfs get all \| grep compression
			</source>

2024-10-24T21:27:50Z

← Older revision		Revision as of 21:27, 24 October 2024
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	#*<source>showmount -e <machine-name></source>		#*<source>showmount -e <machine-name></source>
	#Then follow [[PuppetTricks#Adding_new_mount_point_to_Puppet\|this guide]] to add this new machine to the puppet module		#Then follow [[PuppetTricks#Adding_new_mount_point_to_Puppet\|this guide]] to add this new machine to the puppet module

	~~== Adding L2ARC Read Cache to a zpool==~~
	~~# Look for available SSDs in /dev/disk/by-id/~~
	~~# Choose an available SSD to use for read cache. Then decide which pool you want to put the cache on.~~
	~~Syntax: zpool add <zpool-name> <cache/log> <path to disk>~~
	~~$ sudo zpool add ex6 cache /dev/disk/by-id/ata-INTEL_SSDSC2KG480G7_BTYM72830AV6480BGN~~

	== Tuning ZFS options ==		== Tuning ZFS options ==

2024-10-24T21:26:45Z

← Older revision		Revision as of 21:26, 24 October 2024
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	To stop scrub:		To stop scrub:
	zpool scrub -s <pool_name>		zpool scrub -s <pool_name>

	~~== mount after reboot ==~~
	~~zfs set mountpoint=/export/db2 db2~~

	== recovery from accidental pool destruction ==		== recovery from accidental pool destruction ==

2024-10-24T21:25:43Z

← Older revision		Revision as of 21:25, 24 October 2024
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	NOTE: If you destroyed your zpool with command 'zpool destroy', you can use the command 'zpool import' to view destroyed pools and recover the pool by doing 'zpool import <zpool name>'.		NOTE: If you destroyed your zpool with command 'zpool destroy', you can use the command 'zpool import' to view destroyed pools and recover the pool by doing 'zpool import <zpool name>'.

	~~== Tue Apr 21 2020 ==~~

	~~Ben's commands:~~

	~~fdisk -l 2>/dev/null \| grep -o "zfs.*" > disk_ids~~
	~~split -n 3 disk_ids disk_id_~~
	~~db2_disks=`cat disk_id_aa`~~
	~~db3_disks=`cat disk_id_ab`~~
	~~db5_disks=`cat disk_id_ac`~~
	~~zpool create -f db2 raidz2 $db2_disks~~
	~~zpool create -f db3 raidz2 $db3_disks~~
	~~zpool create -f db5 raidz2 $db5_disks~~
	~~reboot~~

	~~Amended commands, Apr 22- based on advice from john that vdevs should be limited to 12 disks each:~~

	~~fdisk -l 2>/dev/null \| grep -o "zfs.*" > disk_ids~~
	~~split -n 6 disk_ids disk_id_~~

	~~db2_disks_1=`cat disk_id_aa`~~
	~~db2_disks_2=`cat disk_id_ab`~~

	~~db3_disks_1=`cat disk_id_ac`~~
	~~db3_disks_2=`cat disk_id_ad`~~

	~~db5_disks_1=`cat disk_id_ae`~~
	~~db5_disks_2=`cat disk_id_af`~~

	~~zpool create -f db2 raidz2 $db2_disks_1~~
	~~zpool add -f db2 raidz2 $db2_disks_2~~
	~~zpool create -f db3 raidz2 $db3_disks_1~~
	~~zpool add -f db3 raidz2 $db3_disks_2~~
	~~zpool create -f db5 raidz2 $db5_disks_1~~
	~~zpool add -f db5 raidz2 $db5_disks_2~~

	= Troubleshooting =		= Troubleshooting =

2024-10-24T21:25:02Z

2024-04-22T21:19:23Z

Example: Fixing degraded pool, replacing faulted disk

← Older revision		Revision as of 21:19, 22 April 2024
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	In this case, we have to determine the id name of the new disk disk just got inserted with dmesg. Look for log that mentioning about an new disk		In this case, we have to determine the id name of the new disk disk just got inserted with dmesg. Look for log that mentioning about an new disk
	$ dmesg \| tail		$ dmesg -T \| tail
	[7819794.080935] scsi 0:0:40:0: Power-on or device reset occurred		[7819794.080935] scsi 0:0:40:0: Power-on or device reset occurred
	[7819794.099111] sd 0:0:40:0: Attached scsi generic sg8 type 0		[7819794.099111] sd 0:0:40:0: Attached scsi generic sg8 type 0

2024-04-22T21:13:00Z

Example: Fixing degraded pool, replacing faulted disk

← Older revision		Revision as of 21:13, 22 April 2024
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	Resilvering is the process of a disk being rebuilt from its parity group. Once it is finished, you should be good to go again.		Resilvering is the process of a disk being rebuilt from its parity group. Once it is finished, you should be good to go again.
			==== Replace disk by disk ids ====

	For zayin/nfs-exa, some of the disks are named by id instead of the vdev-id. It is recommended to use id instead of vdev-id as vdev-id can change after reboot.		For zayin/nfs-exa, some of the disks are named by id instead of the vdev-id. It is recommended to use id instead of vdev-id as vdev-id can change after reboot.

2024-04-22T21:11:29Z

Example: Fixing degraded pool, replacing faulted disk

← Older revision		Revision as of 21:11, 22 April 2024
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	[7819817.165231] sd 0:0:40:0: [sdi] Attached SCSI disk		[7819817.165231] sd 0:0:40:0: [sdi] Attached SCSI disk

			Check if disk is properly recognized, the new disk should be at the bottom and doesn't have any partition
			$ fdisk -l

			$ cd /dev/disk/by-id
	$ ls -ltr \| grep sdi		$ ls -ltr \| grep sdi
	lrwxrwxrwx. 1 root root 9 Feb 7 13:29 scsi-35000c500d7947833 -> ../../sdi		lrwxrwxrwx. 1 root root 9 Feb 7 13:29 scsi-35000c500d7947833 -> ../../sdi

2022-08-09T22:29:25Z

Identify failed disk by LED light

← Older revision		Revision as of 22:29, 9 August 2022
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	$ ledctl locate_off=/dev/disk/by-id/scsi-35000c500a7d8137f		$ ledctl locate_off=/dev/disk/by-id/scsi-35000c500a7d8137f
	$ ledctl locate=/dev/disk/by-id/scsi-35000c500a7d8137f		$ ledctl locate=/dev/disk/by-id/scsi-35000c500a7d8137f
			$ ledctl locate=/dev/disk/by-partlabel/zfs-c34473d19032c002
	By vdev		By vdev
	# turn light on		# turn light on