Date: Sun, 29 Sep 2013 22:40:11 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Vladislav V. Prodan" <universite@ukr.net>, <fs@freebsd.org> Subject: Re: Zpool (2-mirror) with mixed ashift Message-ID: <B27ADE61D98E45A9BA3F4D16FE71BCAC@multiplay.co.uk> References: <52489897.1070306@ukr.net>
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ashift is only automatically calculated in HEAD or 10 (currently in alpha)
If you're running something older then use gnop to configure 4k sectors
and then creation your pool on .nop device.
Regards
Steve
----- Original Message -----
From: "Vladislav V. Prodan" <universite@ukr.net>
To: <fs@freebsd.org>
Sent: Sunday, September 29, 2013 10:16 PM
Subject: Zpool (2-mirror) with mixed ashift
> Hi all!
>
> I have the misfortune. :(
> I had a system with two HDD with a cluster size of 512b.
> Due to lack of space in the system, it was decided to put the 4 3TB HDD
> in 2-mirror zfs pool
> I used the instructions from the forum:
> http://forums.freebsd.org/showthread.php?t=37819
> But with the addition of the second mirror and the second mirror turned
> out to ashift = 9.
> Notice now zfs pool filled with more than 50%
> How can I safely do a second mirror in the pool ashift=12 without losing
> data?
> How to continue to create 2-mirror zfs pool for 4k HDD?
>
> Thank you.
> A little more than further information:
>
> FreeBSD 9.1-STABLE #0 r251351M: Sat Jun 15 01:22:15 EEST 2013 amd64
>
> # zpool list tank
> NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
> tank 5,44T 3,23T 2,21T 59% 1.16x ONLINE -
>
> # zfs list tank
> NAME USED AVAIL REFER MOUNTPOINT
> tank 3,41T 2,12T 186K /tank
>
> # zpool status
> pool: tank
> state: ONLINE
> scan: resilvered 2,38T in 8h46m with 0 errors on Mon Jun 17 02:32:29 2013
> config:
>
> NAME STATE READ WRITE CKSUM
> tank ONLINE 0 0 0
> mirror-0 ONLINE 0 0 0
> gpt/disk3 ONLINE 0 0 0
> gpt/disk4 ONLINE 0 0 0
> mirror-1 ONLINE 0 0 0
> gpt/disk0 ONLINE 0 0 0
> gpt/disk1 ONLINE 0 0 0
>
> errors: No known data errors
>
>
> # zdb
> tank:
> version: 5000
> name: 'tank'
> state: 0
> txg: 47135
> pool_guid: 13092523331396101530
> hostid: 143250101
> hostname: 'mary-teresa.XXXXX.ua'
> vdev_children: 2
> vdev_tree:
> type: 'root'
> id: 0
> guid: 13092523331396101530
> children[0]:
> type: 'mirror'
> id: 0
> guid: 3335739818
> whole_disk: 0
> metaslab_array: 34
> metaslab_shift: 34
> ashift: 12
> asize: 3000586993664
> is_log: 0
> create_txg: 4
> children[0]:
> type: 'disk'
> id: 0
> guid: 11030443378289800725
> path: '/dev/gpt/disk3'
> phys_path: '/dev/gpt/disk3'
> whole_disk: 1
> DTL: 39
> create_txg: 4
> children[1]:
> type: 'disk'
> id: 1
> guid: 11332687226484843334
> path: '/dev/gpt/disk4'
> phys_path: '/dev/gpt/disk4'
> whole_disk: 1
> DTL: 24
> create_txg: 4
> resilvering: 1
> children[1]:
> type: 'mirror'
> id: 1
> guid: 17121080319583017092
> metaslab_array: 38
> metaslab_shift: 34
> ashift: 9
> asize: 3000586993664
> is_log: 0
> create_txg: 47133
> children[0]:
> type: 'disk'
> id: 0
> guid: 4425616934581567964
> path: '/dev/gpt/disk0'
> phys_path: '/dev/gpt/disk0'
> whole_disk: 1
> create_txg: 47133
> children[1]:
> type: 'disk'
> id: 1
> guid: 5113772130885677504
> path: '/dev/gpt/disk1'
> phys_path: '/dev/gpt/disk1'
> whole_disk: 1
> create_txg: 47133
> features_for_read:
>
>
>
> --
> Vladislav V. Prodan
> System & Network Administrator
> http://support.od.ua
> +380 67 4584408, +380 99 4060508
> VVP88-RIPE
> _______________________________________________
> freebsd-fs@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
>
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