Date: Wed, 23 Apr 2014 09:21:47 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-fs@freebsd.org Subject: Re: ZFS unable to import pool Message-ID: <5357CC7B.2090003@denninger.net> In-Reply-To: <FC0D5991-8F8D-41D5-BB50-AB840C29F362@icloud.com> References: <B493BD80-CDC2-4BA6-AC14-AE16B373A051@icloud.com> <20140423064203.GD2830@sludge.elizium.za.net> <B1024D84-EBBE-4A9B-82C4-5C19B5A66B60@icloud.com> <20140423080056.GE2830@sludge.elizium.za.net> <20140423091852.GH2830@sludge.elizium.za.net> <20140423100126.GJ2830@sludge.elizium.za.net> <5357937D.4080302@gmail.com> <72E79259-3DB1-48B7-8E5E-19CC2145A464@icloud.com> <888649C4-CC66-48A6-9901-BEA93D1BBFA3@mail.turbofuzz.com> <FC0D5991-8F8D-41D5-BB50-AB840C29F362@icloud.com>
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[-- Attachment #1 --] Probably not. You can try importing it read-only but if it refuses that then you're screwed. The reason is that ZFS spreads data in a given file around and as such it's likely that bits of various files are interspersed into the missing device, so a huge percentage of the files on the volume are in fact damaged and unusable. /*Filesystem based "redundancy" is not a backup strategy!*/ On 4/23/2014 9:19 AM, Gennadiy Gulchin wrote: > Any data can be salvaged? > > --Gena > >> On Apr 23, 2014, at 7:15 AM, Jordan Hubbard <jkh@mail.turbofuzz.com> wrote: >> >> If you added a single disk to a pool, you have no choice but to destroy the pool and start over. The single disk will essentially degrade the performance of the whole pool, because it represents a unique (100Mb/sec, typical) transaction group now, and if you lose that one disk you will also lose the entire pool since it has no redundancy. >> >> This is a common mistake people make with ZFS, and it sucks, but block pointer rewrite was never implemented so thats just the way it is, too. Thats another reason for FreeBSD-based front-ends to ZFS like FreeNAS. The GUI adds some seat-belts to prevent users from trivially doing things like that. On the command line, all bets are off. >> >> - Jordan >> >>> On Apr 23, 2014, at 7:09 PM, Gena Guchin <ggulchin@icloud.com> wrote: >>> >>> Looking though the history, i DID add that disk ada7 (!) to the pool, but I added it as a separate disk. I wanted to re-add the disk to the storage pool, but it added as a new disk >>> this does help a lille.. >>> >>> >>> anything I can do now? >>> can I remove that vdev? > _______________________________________________ > 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"#0a/j!y~n> > -- -- Karl karl@denninger.net [-- Attachment #2 --] 0 *H 01 0 + 0 *H O0K030 *H 01 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 130824190344Z 180823190344Z0[1 0 UUS10UFlorida10UKarl Denninger1!0 *H karl@denninger.net0"0 *H 0 bi՞] MNԿawx?`)'ҴcWgR@BlWh+ u}ApdCF JVй~FOL }EW^bچYp3K& ׂ(R lxڝ.xz?6 &nsJ +1v9 v/( kqĪp[vjcK%fϻe?iq]z lyzFO'ppdX//Lw(3 JI A*S#՟H[f|CGqJKoo y.oEuOw$ /섀$삻J9b|A P~8]D1YI<"""Y^T2iQ2 b yH)] Ƶ0y$ _N 6XqMC 9 XgώjGTP"#nˋ"Bk1 00 U 0 0 `HB0 U 0, `HB OpenSSL Generated Certificate0 U |8 ˴d[20 U #0]Af4 U3x&^"408 `HB+)https://cudasystems.net:11443/revoked.crl0 *H gBwH] j\x`( &gW32"Uf^. ^Iϱ k!DQA g{(w /)\N'[ oRW @C HO>)XrTNɘ!u`xt5(=f\-l3<@C6mnhv##1ŃbH͍_Nq aʷ?rk$^9TIa!kh,D -ct1 0001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 + ;0 *H 1 *H 0 *H 1 140423142147Z0# *H 1W>/ F73ٳfO50l *H 1_0]0 `He*0 `He0 *H 0*H 0 *H @0+0 *H (0 +71001 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 *H 101 0 UUS10UFlorida10U Niceville10U Cuda Systems LLC1 0UCuda Systems LLC CA1/0- *H customer-service@cudasystems.net0 *H gErDjd\8Iqx6.Fmi;] %+'x8Bk@3<[O֥J\Xp( |wJ#ic È_CwwywlTrG TZA迺Kd {0/u8&\bl (#Y&{}RV2#F UC5J1>l$YcAU!t 2>.@ TdfB9MâBi ԀJ!"} CM{iI BzLp Ёw J`O*% +;h3(>5C]o*q[eXvZ 9ڧ o{ *(viũ GqcXE1};5 Xe)2 qFBPoZ9LWbzq }'uL[>&-cҰxώ&)
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