Andrew, I forgot to say 'thank you' for tracking this down. Thank you! Cheers, Bruce On Fri, 5 Oct 2007, Andrew Paprocki wrote:
Tejun/Bruce, I tracked down the source of timeouts I have been frequently getting. It appears smartd is not properly handling drives that are spun down by the BIOS ACPI settings. I have SATA timeouts which occur every half hour (the default -i 1800 in smartd) that do not occur when smartd is not running. The drives smartd is configured to look at have a sleep time configured in the BIOS. When the drives are asleep, I get a soft reset every half hour as smartd attempts to access the drives. While in this state, smartd also reports bad state to syslog (e.g. temperature changes to 200C). Just for comparison, hddtemp knows the drives are sleeping: # hddtemp /dev/sda /dev/sda: Hitachi HDS721010KLA330 : drive is sleeping # ls /storage ... wakes up the drives ... # hddtemp /dev/sda /dev/sda: Hitachi HDS721010KLA330 : 29 C or F I'm pasting the example cmd / timeout error / soft reset below. Also, I'm pasting the invalid settings which smartd detects when in this state. What needs to change for smartd to recognize drives are sleeping and either not perform its checks, or forcefully wake them up to perform them? (Should that be a configuration parameter in smartd?) Thanks, -Andrew # uname -a Linux (none) 2.6.22.6 #5 Mon Sep 10 02:15:22 EDT 2007 i586 unknown (Using sata_sil on 3114 chips) # smartctl -V smartmontools release 5.38 dated 2006/12/20 at 20:37:59 UTC ... smartctl compile dated Sep 17 2007 at 13:47:25 (repository code checked out on Sep 17th) # cat /var/run/smartd.conf /dev/sda -d ata -a -S on -s (S/../.././02|L/../../6/03) /dev/sdb -d ata -a -S on -s (S/../.././02|L/../../6/03) What happens every 30 minutes when drives are sleeping: Oct 6 01:05:48 (none) user.err kernel: ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Oct 6 01:05:48 (none) user.err kernel: ata2.00: cmd b0/da:00:00:4f:c2/00:00:00:00:00/00 tag 0 cdb 0x0 data 0 Oct 6 01:05:48 (none) user.warn kernel: res 40/00:01:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout) Oct 6 01:05:53 (none) user.warn kernel: ata2: port is slow to respond, please be patient (Status 0xd0) Oct 6 01:05:55 (none) user.info kernel: ata2: soft resetting port Oct 6 01:05:56 (none) user.info kernel: ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) Oct 6 01:05:56 (none) user.info kernel: ata2.00: configured for UDMA/100 Oct 6 01:05:56 (none) user.info kernel: ata2: EH complete Oct 6 01:05:56 (none) user.notice kernel: sd 1:0:0:0: [sdb] 1953525168 512-byte hardware sectors (1000205 MB) Oct 6 01:05:56 (none) user.notice kernel: sd 1:0:0:0: [sdb] Write Protect is off Oct 6 01:05:56 (none) user.debug kernel: sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 Oct 6 01:05:56 (none) user.notice kernel: sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA Invalid attribute values: Oct 2 22:35:21 (none) daemon.info smartd[585]: Device: /dev/sda, SMART Prefailure Attribute: 7 Seek_Error_Rate changed from 87 to 86 Oct 2 23:35:21 (none) daemon.info smartd[585]: Device: /dev/sda, SMART Prefailure Attribute: 7 Seek_Error_Rate changed from 86 to 85 Oct 5 20:05:56 (none) daemon.info smartd[585]: Device: /dev/sdb, SMART Prefailure Attribute: 3 Spin_Up_Time changed from 84 to 85 Oct 6 01:05:38 (none) daemon.info smartd[585]: Device: /dev/sda, SMART Usage Attribute: 194 Temperature_Celsius changed from 200 to 206 Oct 6 01:05:56 (none) daemon.info smartd[585]: Device: /dev/sdb, SMART Usage Attribute: 194 Temperature_Celsius changed from 193 to 200 Once the drives are started up, those values report: 3 Spin_Up_Time 0x0007 085 085 024 Pre-fail Always - 821 (Average 820) 7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0 194 Temperature_Celsius 0x0002 193 193 000 Old_age Always - 31 (Lifetime Min/Max 24/67)
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