Need help with "reallocated sector count"?
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From: Arno Wagner on 16 Nov 2007 12:37 Previously kimiraikkonen <kimiraikkonen85(a)gmail.com> wrote: > Most of the computer users, including professionals, don't look at or > take care SMART's "reallocated sectors count" value, they usually take > care full / surface scans against data loss unless SMART reaches to a > critical level with alerting. Sounds pretty foolish to me. For example the smartd SMART monitor does report any changes in pre-fail attributes per default, so at least Linux users will typically do better, if they do SMART monitoring. > I have e-mailed Seagate to ask about the topic title, they haven't > replied with a satisfactory answer so far. Maybe they know or not. Who > knows? > Even sometimes, i hear contact noise, i detailed it them, they said: > if the drive passes long test, i shouldn't worry. As i'm not an > amateur, i usually watch SMART values to see what goes on. > My other SMART values are those (latest): > Are they any value that should make me concerned? (no pending or > uncorrectable sectors) Looks all fine to me, ecept for the reallocation count. Arno > Attribute Name Threshold Value > Worst Raw value > ------------------------------------------------------------------------------------------------------------------ > 1 (01) Raw Read Error Rate 34 63 > 53 2778681 > 3 (03) Spin Up Time 0 > 70 70 0 > 4 (04) Start/Stop Count 20 > 100 100 692 > 5 (05) Reallocated Sectors Count 36 98 > 98 98 > 7 (07) Seek Error Rate 30 > 81 60 158998323 > 9 (09) Power-On Hours 0 > 93 93 6591 > 10 (0A) Spin Retry Count 97 100 > 100 0 > 12 (0C) Device Power Cycle Count 20 98 > 98 2602 > 194 (C2) Temperature 0 > 21 51 21 > 195 (C3) Hardware ECC recovered 0 61 > 53 2778681 > 197 (C5) Current Pending Sector Count 0 100 > 100 0 > 198 (C6) Uncorrectable Sector Count 0 100 > 100 0 > 199 (C7) UltraDMA CRC Error Count 0 200 > 200 0 > 200 (C8) Write Error Rate (Multi Zone Error Rate) 0 100 > 253 0 > 202 (CA) Data Address Mark Errors 0 100 > 253 0 > Sorry, if the lines slide out of the page, i use Google to access > newsgroups, don't know how you get here :-( > Thanks.
From: Franc Zabkar on 16 Nov 2007 16:49 On Thu, 15 Nov 2007 06:51:53 -0800 (PST), kimiraikkonen <kimiraikkonen85(a)gmail.com> put finger to keyboard and composed: >Most of the computer users, including professionals, don't look at or >take care SMART's "reallocated sectors count" value, they usually take >care full / surface scans against data loss unless SMART reaches to a >critical level with alerting. > >I have e-mailed Seagate to ask about the topic title, they haven't >replied with a satisfactory answer so far. Maybe they know or not. Who >knows? > >Even sometimes, i hear contact noise, i detailed it them, they said: >if the drive passes long test, i shouldn't worry. As i'm not an >amateur, i usually watch SMART values to see what goes on. > >My other SMART values are those (latest): > >Are they any value that should make me concerned? (no pending or >uncorrectable sectors) > > Attribute Name Threshold Value >Worst Raw value >------------------------------------------------------------------------------------------------------------------ >1 (01) Raw Read Error Rate 34 63 >53 2778681 >3 (03) Spin Up Time 0 >70 70 0 >4 (04) Start/Stop Count 20 >100 100 692 >5 (05) Reallocated Sectors Count 36 98 >98 98 >7 (07) Seek Error Rate 30 >81 60 158998323 >9 (09) Power-On Hours 0 >93 93 6591 >10 (0A) Spin Retry Count 97 100 >100 0 >12 (0C) Device Power Cycle Count 20 98 >98 2602 >194 (C2) Temperature 0 >21 51 21 >195 (C3) Hardware ECC recovered 0 61 >53 2778681 >197 (C5) Current Pending Sector Count 0 100 >100 0 >198 (C6) Uncorrectable Sector Count 0 100 >100 0 >199 (C7) UltraDMA CRC Error Count 0 200 >200 0 >200 (C8) Write Error Rate (Multi Zone Error Rate) 0 100 >253 0 >202 (CA) Data Address Mark Errors 0 100 >253 0 > >Sorry, if the lines slide out of the page, i use Google to access >newsgroups, don't know how you get here :-( > >Thanks. From what I've seen, good Seagate drives normally have large numbers for Raw Read Error Rate, Seek Error Rate, and Hardware ECC Recovered. In any case I don't believe the numbers necessarily reflect errors. For example, based on my testing, Seagate's "Seek Error Rate" stat appears to be a count rather than a rate, and it appears to count seeks rather than seek errors. See this old thread: http://groups.google.com/group/comp.sys.ibm.pc.hardware.storage/browse_thread/thread/9519f7ad86d7be72/14f4a561a397493c?hl=en&lnk=st&q=#14f4a561a397493c Here are some examples of SmartUDM reports. Seagate 120GB HD: http://www.users.on.net/~fzabkar/SmartUDM/120GB.RPT Fujitsu 6GB HD: http://www.users.on.net/~fzabkar/SmartUDM/6GB.RPT Seagate 13GB HD (with 119 reallocated sectors): http://www.users.on.net/~fzabkar/SmartUDM/13GB.RPT - Franc Zabkar -- Please remove one 'i' from my address when replying by email.
From: John Turco on 18 Nov 2007 00:01
kimiraikkonen wrote: <heavily edited for brevity> > Sorry, if the lines slide out of the page, i use Google to access > newsgroups, don't know how you get here :-( > > Thanks. Hello, A free NNTP server (aioe.cjb.net) allows me to both read, and to post to, various Usenet (non-binary) newsgroups. Please, go here, for further information: Aioe.org Home Page <http://www.aioe.org> Good luck! Cordially, John Turco <jtur(a)concentric.net> |