Date: Mon, 26 Jul 2010 17:22:05 +0200 From: Bernd Walter <ticso@cicely7.cicely.de> To: freebsd-fs@freebsd.org Cc: Bernd Walter <ticso@cicely7.cicely.de> Subject: zfs read error without disk error. Message-ID: <20100726152158.GC77280@cicely7.cicely.de>
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I've upgraded my system to recent 8 and switched disks to CAM.
Since I've been seeing CRC errors from time to time I've decided to
start a scrub.
My disks are connected to Inteln AHCI onboard and SiI 3132 with CAM.
I have an SSD cache device attached to SiI3114 (cache6) with ata driver.
And i have 4 USB flash sticks for additional cache.
The system is booting with UFS from a 4G CF media attached to a SiI 680.
Now I see the following:
[156]cicely14# zpool status -v
pool: data
state: ONLINE
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
using 'zpool clear' or replace the device with 'zpool replace'.
see: http://www.sun.com/msg/ZFS-8000-9P
scrub: scrub in progress for 24h46m, 67.17% done, 12h6m to go
config:
NAME STATE READ WRITE CKSUM
data ONLINE 0 0 0
raidz1 ONLINE 0 0 0
ada6 ONLINE 0 0 0
ada3 ONLINE 0 0 0
ada5 ONLINE 1 0 0 42.5K repaired
ada4 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
ada0 ONLINE 0 0 5 13K repaired
ada1 ONLINE 0 0 0
ada7 ONLINE 0 0 1 14K repaired
ada2 ONLINE 0 0 0
cache
label/cache6 ONLINE 0 0 0
label/cache7 ONLINE 4 0 0
label/cache8 ONLINE 2 3 0
label/cache9 ONLINE 2 2 0
label/cache10 ONLINE 1 3 0
errors: No known data errors
Kernel just has:
(da2:umass-sim2:2:0:0): AutoSense failed
(da0:umass-sim0:0:0:0): AutoSense failed
(da2:umass-sim2:2:0:0): AutoSense failed
(da1:umass-sim1:1:0:0): AutoSense failed
(da3:umass-sim3:3:0:0): AutoSense failed
Probably the USB AutoSense failed have something to do with the cache
device read/write errors, but they are not listed as read read/write
errors.
The checksum errors are of unknown reason, but of course not mentioned
by the kernel, but ada5 also has a read error for which the kernel has
no message either.
[158]cicely14# camcontrol devlist -v
scbus0 on siisch0 bus 0:
<ST3500630AS 3.AAC> at scbus0 target 0 lun 0 (pass0,ada0)
<> at scbus0 target -1 lun -1 ()
scbus1 on siisch1 bus 0:
<ST3500630AS 3.AAC> at scbus1 target 0 lun 0 (pass1,ada1)
<> at scbus1 target -1 lun -1 ()
scbus2 on siisch2 bus 0:
<ST3500630AS 3.AAC> at scbus2 target 0 lun 0 (pass2,ada2)
<> at scbus2 target -1 lun -1 ()
scbus3 on siisch3 bus 0:
<ST3500630AS 3.AAC> at scbus3 target 0 lun 0 (pass3,ada3)
<> at scbus3 target -1 lun -1 ()
scbus4 on ahcich0 bus 0:
<ST3500630AS 3.AAK> at scbus4 target 0 lun 0 (pass4,ada4)
<> at scbus4 target -1 lun -1 ()
scbus5 on ahcich1 bus 0:
<ST3500630AS 3.AAK> at scbus5 target 0 lun 0 (pass5,ada5)
<> at scbus5 target -1 lun -1 ()
scbus6 on ahcich2 bus 0:
<> at scbus6 target -1 lun -1 ()
scbus7 on ahcich3 bus 0:
<> at scbus7 target -1 lun -1 ()
scbus8 on ahcich4 bus 0:
<ST3500630AS 3.AAK> at scbus8 target 0 lun 0 (pass6,ada6)
<> at scbus8 target -1 lun -1 ()
scbus9 on ahcich5 bus 0:
<ST3500630AS 3.AAC> at scbus9 target 0 lun 0 (pass7,ada7)
<> at scbus9 target -1 lun -1 ()
scbus10 on umass-sim0 bus 0:
<USB2.0 FlashDisk 0.00> at scbus10 target 0 lun 0 (da0,pass8)
scbus11 on umass-sim1 bus 1:
<USB2.0 FlashDisk 0.00> at scbus11 target 0 lun 0 (da1,pass9)
scbus12 on umass-sim2 bus 2:
<USB2.0 FlashDisk 0.00> at scbus12 target 0 lun 0 (da2,pass10)
scbus13 on umass-sim3 bus 3:
<USB2.0 FlashDisk 0.00> at scbus13 target 0 lun 0 (da3,pass11)
scbus-1 on xpt0 bus 0:
<> at scbus-1 target -1 lun -1 (xpt0)
[159]cicely14# atacontrol list
ATA channel 2:
Master: no device present
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
ATA channel 4:
Master: no device present
Slave: no device present
ATA channel 5:
Master: ad10 <TS32GSSD25S-M/V090331> SATA revision 2.x
Slave: no device present
ATA channel 6:
Master: no device present
Slave: no device present
ATA channel 7:
Master: ad14 <TRANSCEND/20080128> ATA/ATAPI revision 4
Slave: no device present
ATA channel 8:
Master: ad16 <TRANSCEND/20070831> ATA/ATAPI revision 0
Slave: no device present
--
B.Walter <bernd@bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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