Date: Wed, 3 Aug 2016 00:18:49 -0400 From: Jon Radel <jon@radel.com> To: "William A. Mahaffey III" <wam@hiwaay.net>, FreeBSD Questions !!!! <freebsd-questions@freebsd.org> Subject: Re: Ominous smartd messages .... Message-ID: <117bb75c-aa6a-d562-c971-d0bab742f5ad@radel.com> In-Reply-To: <e5a65f8a-27a0-65e7-42db-28bef824e0c0@hiwaay.net> References: <e5a65f8a-27a0-65e7-42db-28bef824e0c0@hiwaay.net>
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[-- Attachment #1 --] On 8/2/16 11:41 PM, William A. Mahaffey III wrote: > It has 8 1 TB HDD's in a ZFS unmirrored pool. Do I understand this to mean you have 8 TB with no redundancy? Pretty brutal if your data starts rotting away. :-( > Aug 1 23:09:59 devbox smartd[835]: Device: /dev/ada5, 8 Currently > unreadable (pending) sectors > > My question is: Are these messages benign, or am I in the market for > more hardware ? *ANY* more questions, please ask. TIA & have a good one. > Somewhere between, YMMV, depends on your luck and the phase of the moon. That's useless, so I'll expand: I've read reasonable sounding commentary from people running very, very large collections of hard drives that there is a high enough correlation between this error and the drive going to heck sooner rather than later that they take this as a sign to replace. [Can't find reference right now.] I've read reasonable sounding commentary that by writing to the bad sector(s) you can force the HD to reallocate the sectors (assuming remaining capacity to do that) and then use ZFS redundancy and a good scrub to recover the data you trashed with dd (might not apply to you). Then there's a good chance that all will be well indefinitely. See https://dekoder.wordpress.com/2014/10/08/fixing-freenas-currently-unreadable-pending-sectors-error/ for an example of this school of thought. Actually, given that the messages stopped again, I suspect reallocation already happened, but a smartd test should tell you for certain. (You didn't have a scrub running between 8/2 03:39 and 04:09 by any chance?) Personally, so long as only one drive in my pool is doing this I tend to replace but not rush. I'd rush more if the sector count started creeping up, up, up. -- --Jon Radel jon@radel.com [-- Attachment #2 --] 0 *H 010 `He 0 *H 00 #SanzTgk!0 *H 0o1 0 USE10U AddTrust AB1&0$U AddTrust External TTP Network1"0 UAddTrust External CA Root0 141222000000Z 200530104838Z01 0 UGB10UGreater Manchester10USalford10U COMODO CA Limited1A0?U8COMODO SHA-256 Client Authentication and Secure Email CA0"0 *H 0 zSNpR V&IQZI`zQBy"aNv# J n=ٺ.CRC|2PȦOZϓ%{0dV*$3DiFK3@@:*S= a<UNv%!)|qvO_T{5R"=,0-1YR73i-C֥wgQ'뼥8v8ߌIs:2:=F:WtaP@?⟢! 00 U #0z4&&T$T0 U akᢠOg£ 0U 0U 0 0 U %0++0U 00U 0DU =0;09753http://crl.usertrust.com/AddTrustExternalCARoot.crl05+)0'0%+0http://ocsp.usertrust.com0 *H *nU:Uka+ #fjow^a } [jr AX&MX"cR6}Xޫ;cs{B#ʶM>K-ػBKiۦ74{:ǟO4ne6d)5ֱqC>2Svʆ4, Jؙ ␒ZBj#!eջ~ꌅ b:,Yř38z yJ&|00sT<}k `i 0 *H 01 0 UGB10UGreater Manchester10USalford10U COMODO CA Limited1A0?U8COMODO SHA-256 Client Authentication and Secure Email CA0 150330000000Z 180329235959Z01 0 UUS10 U221501 0 UVA10U Springfield10U 6917 Ridgeway Dr.10U Jon T. Radel1200U )Issued through Jon T. Radel E-PKI Manager1 0 U Corporate Secure Email10U Jon Radel1 0 *H jon@radel.com0"0 *H 0 aЩ@@g3eGރ͛; d#>q7&Hf :3vL" jV#Xݷ>U-H[$SUڻ{Ϝ,z¶IchO=rcyr n v.Vh7k;%ueYuӬnz 6!| !Aȡ+,u+ CAպF-un#vjUJWnk%j] 2JPkl 00 U #0akᢠOg£ 0 U E|GDp/ʚB0U 0 U 0 0 U %0++0FU ?0=0; +10+0)+ https://secure.comodo.net/CPS0]U V0T0RPNLhttp://crl.comodoca.com/COMODOSHA256ClientAuthenticationandSecureEmailCA.crl0+00X+0Lhttp://crt.comodoca.com/COMODOSHA256ClientAuthenticationandSecureEmailCA.crt0$+0http://ocsp.comodoca.com0U 0 jon@radel.com0 *H KS `?H_D`8G߿ VbĘ<tB-Ӈї|{'Ũݹg0Gp$%F(;*MO*gt$@ t6,?0|#ăz,&! {j2i[%b7ߪP+9G㲍["y<?8rZ'[UR6%L̤ w"=:L~Ƨ^jf36 OP1.}(e1A0=001 0 UGB10UGreater Manchester10USalford10U COMODO CA Limited1A0?U8COMODO SHA-256 Client Authentication and Secure Email CAsT<}k `i 0 `He a0 *H 1 *H 0 *H 1 160803041849Z0/ *H 1" reXڸLFsL%=]:0CC0l *H 1_0]0 `He*0 `He0 *H 0*H 0 *H @0+0 *H (0 +71001 0 UGB10UGreater Manchester10USalford10U COMODO CA Limited1A0?U8COMODO SHA-256 Client Authentication and Secure Email CAsT<}k `i 0 *H 101 0 UGB10UGreater Manchester10USalford10U COMODO CA Limited1A0?U8COMODO SHA-256 Client Authentication and Secure Email CAsT<}k `i 0 *H zUXlGln l"Vcl Kw'07&`F@M,j ɲ os 3BUy /Lqal9% F%Cp&Ӈ~9yMaӣ H$.p}K>|5 HV=!8V͍g`ě[ h v;~dwLanm@ )܊K1?`ҏ8)vM(&\Pb3I Ghelp
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