search for: fletcher4

Hi, I''m atmost ready to deploy my new homeserver for final testing. Before I want to be sure that nothing big is left untouched. Reading ZFS Admin Guide About the checksum method, there''s no advice about it. The default is fletcher4. there''s also SHA256 Now the sha256 is pretty ''heavy'' to calculate, so I think that it''s left out because can impact the performance in some significative way. right ? Is SHA256 a good step-up to guarantee ''correct data'' over fletcher4, or it&...

...t system, the rpool being uncompressed with 512-byte sectors. Here''s some output that puzzles me (questions follow): # zdb -dddddddd -bbbbbb rpool/ROOT/nightly-2012-01-31 260050 ... 1e80000 L0 DVA[0]=<0:200972e00:20200> DVA[1]=<0:391820a00:200> [L0 ZFS plain file] fletcher4 uncompressed LE gang unique single size=20000L/20000P birth=743480L/743480P fill=1 cksum=40ed72fd1a7e:10813724cba2f082:99adc8fc26918419:77a6a1f23fa0600 1ea0000 L0 DVA[0]=<0:206373000:20000> [L0 ZFS plain file] fletcher4 uncompressed LE contiguous unique single size=20000L/2000...

...tank and got this output after letting it run all night: ----- SNIP ----- Traversing all blocks to verify checksums ... zdb_blkptr_cb: Got error 50 reading <0, 80, 0, 0> DVA[0]=<0:28b61ec9600:1200> DVA[1]=<0:149e50a5400:1200> DVA[2]=<0:9f83efe800:1200> [L0 SPA space map] fletcher4 lzjb LE contiguous unique triple size=1000L/a00P birth=2561650L/2561650P fill=1 cksum=6e4fd979ea:97c2e68bdf84:7cfea1e3255982:4ca2471aa9f3c833 -- skipping zdb_blkptr_cb: Got error 50 reading <0, 80, 0, 1> DVA[0]=<0:28b61ecba00:1200> DVA[1]=<0:149e50a7800:1200> DVA[2]=<0:9f83f00c...

Hi I know some of this has been discussed in the past but I can''t quite find the exact information I''m seeking (and I''d check the ZFS wikis but the websites are down at the moment). Firstly, which is correct, free space shown by "zfs list" or by "zpool iostat" ? zfs list: used 50.3 TB, free 13.7 TB, total = 64 TB, free = 21.4% zpool iostat: used

...rance of the pool may be compromised. REC-ACTION: Run ''zpool status -x'' and replace the bad device. panic[cpu0]/thread=2a1011d3cc0: ZFS: I/O failure (write on <unknown> off 0: zio 60007432bc0 [L0 unallocated] 4000L/400P DVA[0]=<0:b000:400> DVA[1]=<0:120a000:400> fletcher4 lzjb BE contiguous birth=6 fill=0 cksum=672165b9e7:328e78ae25fd:ed007c9008f5f:34c05b10900b668): error 6 000002a1011d3740 zfs:zio_done+284 (60007432bc0, 0, a8, 7035dbf0, 0, 60006fa9700) %l0-3: 00000600036d4b40 000000007035d800 0000000000000006 0000000000000006 %l4-7: 000000007bb9a278 0000000000...

...fs filesystems I got a kernel panic: > debugging crash dump vmcore.0 (32-bit) from blackbird > operating system: 5.11 snv_28 (i86pc) > panic message: > ZFS: bad checksum (read on /dev/dsk/c1d0p0 off 24d5e000: zio d3d9d800 > [L0 DMU objset] vdev=0 offset=2495e000 size=400L/200P/200A fletcher4 > lzjb LE contiguous birth=2174 fill=17 cksum=82ee33d1a:38baba > dump content: kernel pages only I then bfu-ed up to b29 and tried to zpool import and get another kernel panic. > debugging crash dump vmcore.9 (32-bit) from blackbird > operating system: 5.11 brandz_release-2005-12-2...

Hello all, I have an oi_148a PC with a single root disk, and since recently it fails to boot - hangs after the copyright message whenever I use any of my GRUB menu options. Booting with an oi_148a LiveUSB I had around since installation, I ran some zdb traversals over the rpool and zpool import attempts. The imports fail by running the kernel out of RAM (as recently discussed in the list with

...pflags 40800000104 xattr 0 rdev 0x0000000000000000 if i further investigate: zdb -ddddd dataset 7 Dataset store/nfs/ICLOS/prod/mail-cts [ZPL], ID 4525, cr_txg 91826, 149G, 5 objects, rootbp DVA[0]=<0:6654f24000:200> DVA[1]=<1:1a1e3c3600:200> [L0 D MU objset] fletcher4 lzjb LE contiguous unique double size=800L/200P birth=182119L/182119P fill=5 cksum=177e7dd4cd:81ae6d143ee:1782c972431a0:2f927ca7 a1de2c Object lvl iblk dblk dsize lsize %full type 7 5 16K 128K 149G 256G 58.26 ZFS plain file...

...49 kern.notice] Apr 23 02:02:22 SERVER144 ^Mpanic[cpu1]/thread=ffffff0017fa1c80: Apr 23 02:02:22 SERVER144 genunix: [ID 809409 kern.notice] ZFS: I/O failure (write on <unknown> off 0: zio ffffffff9a5d4cc0 [L0 bplist] 4000L/4000P DVA[0]=<0:770b24 000:4000> DVA[1]=<0:dfa984000:4000> fletcher4 uncompressed LE contiguous birth=260276 fill=1 cksum=1:1000:800800:2ab2ab000): error 5 Apr 23 02:02:22 SERVER144 unix: [ID 100000 kern.notice] Apr 23 02:02:23 SERVER144 genunix: [ID 655072 kern.notice] ffffff0017fa1a40 zfs:zio_done+17c () Apr 23 02:02:23 SERVER144 genunix: [ID 655072 kern.notice] f...

...pc fcip fctl fcp logindmux ] > ::status debugging crash dump vmcore.0 (32-bit) from unknown operating system: 5.11 snv_48 (i86pc) panic message: ZFS: bad checksum (read on <unknown> off 0: zio dbbf8880 [L1 ZFS plain file] 4000L/400P DVA[0]=<0:6aa000:800> DVA[1]=<0:b80a7000:800> fletcher4 lzjb LE contiguous birth=12316 fill=2 cksum=601eba85e8: dump content: kernel pages only > ::spa ADDR STATE NAME da9f5ac0 ACTIVE backup > ::memstat Page Summary Pages MB %Tot ------------ ---------------- ---------------- ---- Kernel...

...local/music 7782 3145728-3276800 zdb -vvv local/music 31018 Dataset local/music [ZPL], ID 21, cr_txg 286098, last_txg 569229, 266G, 47341 objects, rootbp [L0 DMU objset] 400L/200P DVA[0] =<1:1e60334600:200> DVA[1]=<0:1f34545e00:200> DVA[2] =<1:209bb8a00:200> fletcher4 lzjb LE contiguous birth=569229 fill=47341 cksum=bfbec0b7e:4cabe29d1ca:f8ffe68a911f:22341ff0761b57 Object lvl iblk dblk lsize asize type 31018 2 16K 128K 7.50M 7.51M ZFS plain file 264 bonus ZFS znode path /Mos Def/Bla...

...2 Vendor: EMC Serial Number: 900D5008U Sense Key: panic[cpu0]/thread=2a10103bcc0: Write Protected ZFS: I/O failure (write on <unknown> off 0: zio 6001f3f2340 [L0 DMU dnode] 4000L/a00P DVA[0]=<0:54e000:a00> DVA[1]=<0:d000ab800:a00> fletcher4 lzjb BE contiguous birth=597 fill=31 cksum=97d1c4f896:dd5b900a7ec8:b89066e037beda:7021cc17c66f4713): error 6 000002a10103b880 zfs:zio_done+29c (0, 10, 6000e361400, 600202bfb80, 6001f3f2340, 0) %l0-3: 0000060003233b40 00000600109c1740 000000007085a218 0000000000000006 %l4-7: 0000000000000002 00...

...ve been able to collect so far: In the messages file: Nov 4 13:24:11 mondo4 savecore: [ID 570001 auth.error] reboot after panic: ZFS: I/O failure (write on <unknown> off 0: zio ffffffff97c86a00 [L0 DMU dnode] 4000L/1000P DVA[0]=<0 :d08cf11b800:1800> DVA[1]=<0:1020a711c800:1800> fletcher4 lzjb LE contiguous birth=731555 fill=32 Nov 4 13:24:11 mondo4 savecore: [ID 570001 auth.error] reboot after panic: ZFS: I/O failure (write on <unknown> off 0: zio ffffffff97c86a00 [L0 DMU dnode] 4000L/1000P DVA[0]=<0 :d08cf11b800:1800> DVA[1]=<0:1020a711c800:1800> fletcher4 lzjb...

...= 0000000000bab10c version = 4 txg = 1504158 guid_sum = 10365405068077835008 timestamp = 1229142108 UTC = Sat Dec 13 15:21:48 2008 rootbp = [L0 DMU objset] 400L/200P DVA[0]=<0:52e3edc00:200> DVA[1]=<0:6f9c1d600:200> DVA[2]=<0:16e280400:200> fletcher4 lzjb LE contiguous birth=1504158 fill=172 cksum=b0a5275f3:474e0ed6469:e993ed9bee4d:205661fa1d4016 I''ve also checked the labels. root at kestrel:/opt$ zdb -U -lv zpool.zones -------------------------------------------- LABEL 0 -------------------------------------------- version=4...

...get the info about the object: sjcbackup01# zdb -vvv zfspool01/nb60openv 292 Dataset zfspool01/nb60openv [ZPL], ID 20, cr_txg 23, last_txg 2158772, 92.3G, 59005 objects, rootbp [L0 DMU objset] 400L/200P DVA[0]=<0:18c0349600:200> DVA[1]=<0:6c0329600:200> DVA[2]=<0:102040a200:200> fletcher4 lzjb BE contiguous birth=2158772 fill=59005 cksum=103d9a0f86:66dfb432a03:14f23e0662778:2ebcc4bd282dfb ZIL header: claim_txg 2154406, seq 0 first block: [L0 ZIL intent log] 13000L/13000P DVA[0]=<0:7208e9000:13000> zilog uncompressed BE contiguous birth=2154403 fill=0 cksum=5f8aab...

...l theories aside, here is the output of the error we see every time the `zpool import home` command fails: panic[cpu8]/thread=2a100b69cc0: ZFS: bad checksum (read on off 0: zio 60015f26a40 [L0 packed nvlist] 4000L/400P DVA[0]=&lt;0:4000b7000:400&gt; DVA[1]=&lt;0:4600063800:400&gt; fletcher4 lzjb BE contiguous birth=3865837 fill=1 cksum=6e858ee992:2cad0296498c:cae1d40ad3d38:2e1daaef734ef08): error 50 000002a100b69880 zfs:zio_done+29c (0, 10, 60015f26a98, 60012e062c0, 60015f26a40, 0) %l0-3: 0000060015d04040 00000600160ffac0 00000000707de1c0 0000000000000032 %l4-7: 0000000000000001 00...

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''m playing around with snv_128 on one of my systems, and trying to see what kinda of benefits enabling dedup will give me. The standard practice for reprocessing data that''s already stored to add compression and now dedup seems to be a send / receive pipe similar to: zfs send -R <old fs>@snap | zfs recv -d <new fs> However, according to the man page,

..., I haven''t > > been able to > > reproduce. > > Relevant info from /var/adm/messaages Nov 19 09:09:34 fugly genunix: [ID 809409 kern.notice] ZFS: I/O failure (write on /dev/dsk/c0d1 off 8504e8200: zio d5 3a5600 [L0 unallocated] vdev=0 offset=8500e8200 size=200L/200P/200A fletcher4 uncompressed LE contiguous birth=41837 fill=0 cksum=bcd3026a:5d6fdb3032:174cfede75e7:3e7752513e700): error 6 Nov 19 09:09:34 fugly unix: [ID 100000 kern.notice] Nov 19 09:09:34 fugly genunix: [ID 353471 kern.notice] d51e5c7c zfs:zio_done+199 (d53a5600) Nov 19 09:09:34 fugly genunix: [ID 353471 kern...

...6.12:46:32 zpool import tank.2 2007-11-26.12:47:02 zpool scrub tank.2 2007-11-26.12:48:11 zpool add tank.2 spare c5t21d0 c4t17d0 c4t21d0 2007-11-26.14:02:08 zpool scrub -s tank.2 2007-11-27.01:56:35 zpool clear tank.2 2007-11-27.01:57:02 zfs set atime=off tank.2 2007-11-27.01:57:07 zfs set checksum=fletcher4 tank.2 2007-11-27.01:57:45 zfs create tank.2/a 2007-11-27.01:57:46 zfs create tank.2/b 2007-11-27.01:57:47 zfs create tank.2/c 2007-11-27.01:59:39 zpool scrub tank.2 2007-12-05.15:31:51 zpool online tank.2 c5t23d0 2007-12-05.15:32:02 zpool online tank.2 c5t29d0 2007-12-05.15:36:58 zpool online tank...