similar to: recovering data from a dettach mirrored vdev

Hi all, I have a 5 drive RAIDZ volume with data that I''d like to recover. The long story runs roughly: 1) The volume was running fine under FreeBSD on motherboard SATA controllers. 2) Two drives were moved to a HP P411 SAS/SATA controller 3) I *think* the HP controllers wrote some volume information to the end of each disk (hence no more ZFS labels 2,3) 4) In its "auto

2. update ZFS in libfsimage from illumos for pygrub diff -r 7c12aaa128e3 -r c2e11847cac0 tools/libfsimage/Rules.mk --- a/tools/libfsimage/Rules.mk Thu Oct 24 22:46:20 2013 +0100 +++ b/tools/libfsimage/Rules.mk Sat Oct 26 20:03:06 2013 +0400 @@ -2,11 +2,19 @@ include $(XEN_ROOT)/tools/Rules.mk CFLAGS += -Wno-unknown-pragmas -I$(XEN_ROOT)/tools/libfsimage/common/

I have a ZFS pool that has been corrupted. The pool contains a single device which was actually a file on UFS. The machine was accidentally halted and now the pool is corrupt. There are (of course) no backups and I''ve been asked to recover the pool. The system panics when trying to do anything with the pool. root@:/$ zpool status panic[cpu1]/thread=fffffe8000758c80: assertion failed:

ZFS documentation lists snapshot limits on any single file system in a pool at 2**48 snaps, and that seems to logically imply that a snap on a file system does not require an update to the pool?s currently active uberblock. That is to say, that if we take a snapshot of a file system in a pool, and then make any changes to that file system, the copy on write behavior induced by the changes will

I had to use the labelfix hack (and I had to recompile it at that) on 1/2 of an old zpool. I made this change: /* zio_checksum(ZIO_CHECKSUM_LABEL, &zc, buf, size); */ zio_checksum_table[ZIO_CHECKSUM_LABEL].ci_func[0](buf, size, &zc); and I''m assuming [0] is the correct endianness, since afterwards I saw it come up with "zpool import". Unfortunately, I

Tuning should not be done in general and Best practices should be followed. So get very much acquainted with this first : http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide Then if you must, this could soothe or sting : http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide So drive carefully. -r

Hello all, I found this dialog on the zfs-devel at zfsonlinux.org list, and I''d like someone to confirm-or-reject the discussed statement. Paraphrasing in my words and understanding: "Labels, including Uberblock rings, are fixed 256KB in size each, of which 128KB is the UB ring. Normally there is 1KB of data in one UB, which gives 128 TXGs to rollback to. When ashift=12 is

Has anyone worked with a x4500/x4540 and know if the internal raid controllers have a bbu? I''m concern that we won''t be able to turn off the write-cache on the internal hds and SSDs to prevent data corruption in case of a power failure. -- This message posted from opensolaris.org

Let me preface this by admitting that I''m a bonehead. I had a mirrored a zfs filesystem. I needed to use one of the mirrors temporarily so I did a zpool detach to remove the member (call it disk1) leaving disk0 in the pool. However, after the detach I mistakenly wiped disk0. So here is the question. I haven''t touched disk1 yet so the data is hopefully still there. Is there

Hi Folks.. I have/had a zpool containing one filesystem. I had to change my hostid and needed to import my pool, (I''ve done his OK in the past). After the import the mount of my filesystem failed. # zpool import homespool cannot mount ''homespool/homes'': mountpoint or dataset is busy The data seems it might still exist, (correct amount of used space is reported),

Hello, I''ve looked around Google and the zfs-discuss archives but have not been able to find a good answer to this question (and the related questions that follow it): How well does ZFS handle unexpected power failures? (e.g. environmental power failures, power supply dying, etc.) Does it consistently gracefully recover? Should having a UPS be considered a (strong) recommendation or

Hi, If I add an entire disk to a new pool by doing "zpool create", is this reversible? I.e. if there was data on that disk (e.g. it was the sole disk in a zpool in another system) can I get this back or is zpool create destructive? Joubert This message posted from opensolaris.org

OK, I am a butt-head and accidentally destroyed my last snapshot of a replicated ZFS dataset. The dataset is NOT mounted and other than a resilver going on, there is no I/O going on to this dataset. Is there any way to roll back and get my latest snapshot back? from zpool history -i: 2012-06-18.10:34:00 zfs destroy xxx at 1339668001 2012-06-18.10:34:00 [internal destroy txg:2213852] dataset =

I have three zpools on a server and want to add a mirrored pair of ssd''s for the ZIL. Can the same pair of SSDs be used for the ZIL of all three zpools or is it one ZIL SLOG device per zpool? -- This message posted from opensolaris.org

I have a lot of people whispering "zfs" in my virtual ear these days, and at the same time I have an irrational attachment to xfs based entirely on its lack of the 32000 subdirectory limit. I''m not afraid of ext4''s newness, since really a lot of that stuff has been in Lustre for years. So a-benchmarking I went. Results at the bottom:

Long story short, my cat jumped on my server at my house crashing two drives at the same time. It was a 7 drive raidz (next time ill do raidz2). The server crashed complaining about a drive failure, so i rebooted into single user mode not realizing that two drives failed. I put in a new 500g replacement and had zfs start a replace operation which failed at about 2% because there was two broken

We''re currently designing a ZFS fileserver environment with iSCSI based storage (for failover, cost, ease of expansion, and so on). As part of this we would like to use multipathing for extra reliability, and I am not sure how we want to configure it. Our iSCSI backend only supports multiple sessions per target, not multiple connections per session (and my understanding is that the

I would like to pick the brains of the ZFS experts on this list: What would you do next to try and recover this zfs pool? I have a ZFS RAIDZ1 pool named bank0 that I cannot import. It was composed of 4 1.5 TiB disks. One disk is totally dead. Another had SMART errors, but using GNU ddrescue I was able to copy all the data off successfully. I have copied all 3 remaining disks as images using

I sent a zvol from host a, to host b, twice. Host b has two pools, one ashift=9, one ashift=12. I sent the zvol to each of the pools on b. The original source pool is ashift=9, and an old revision (2009_06 because it''s still running xen). I sent it twice, because something strange happened on the first send, to the ashift=12 pool. "zfs list -o space" showed figures at

Hi, in preparation to try zfs boot on sparc I installed all recent patches incl. feature patches comming from s10s_u3wos_10 and after reboot finally 137137-09 (still having everything on UFS). Now it doesn''t boot at anymore: ############################### Sun Fire V240, No Keyboard Copyright 2006 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.22.23, 2048 MB memory installed,