We have a Dell PowerEdge T110 running Fedora 14 which operates as our build server for Embedded Linux and as our Subversion server.
Recently it has become very slow, failing to complete nightly backups before the new day begins.
[EDIT]
Thanks User9517 - I've checked the log and there are multiple messages from MRMON (Mega Raid Monitor). Any guidance on interpreting these messages, next steps, and how to determine which drive needs replacing would help.
Dec 20 09:02:32 localhost MR_MONITOR[2153]: <MRMON096> Controller ID: 0 PD Predictive failure: #012 -:-:2
Dec 20 09:06:44 localhost MR_MONITOR[2153]: <MRMON113> Controller ID: 0 Unexpected sense: PD #012 = -:-:2No defect spare location available, CDB = 0x28 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 , Sense = 0x70 0x00 0x04 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x32 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Dec 20 09:09:44 localhost MR_MONITOR[2153]: <MRMON096> Controller ID: 0 PD Predictive failure: #012 -:-:2
[/EDIT]
I'm looking for assistance to track down the fault. I'm definitely no expert on this, the person who set up the system originally is no longer here.
The nightly backup is approximately 6 GByte tgz file, which starts at 8pm. This used to finish around 4am (including copying to an external drive). Weekly backup is around 45 GByte, this used to finish at 11am Saturday from a Friday 8pm start.
In addition to the backup, the machine is noticeably slow to respond, even when the backup process is not running.
Here is what I have gathered so far:
There is a RAID controller DELL PERC H200L with Four Seagate 1TB Drives attached (ST31000424SS). I think it's setup for RAID 10, but I don't know how to access the configuration for this controller. I believe RAID 10 because there are 4 drives, and vgdisplay shows 1.81 Terabytes allocated of the 4 terabytes total on the 4 drives.
[root@fedorabox backup]# vgdisplay
--- Volume group ---
VG Name vg_fedorabox2
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 5
Open LV 5
Max PV 0
Cur PV 1
Act PV 1
VG Size 1.81 TiB
PE Size 32.00 MiB
Total PE 59263
Alloc PE / Size 28480 / 890.00 GiB
Free PE / Size 30783 / 961.97 GiB
I can't see any other actual drives in the machine, so I guess the boot partition (/dev/sdb1) is somehow partitioned out of the 4 drives.
(/dev/sda is an external hard-drive for backups - but this isn't the problem. The backup is still being generated on the /backup partition when we arrive in the morning. The copy to the USB attached drive hasn't started)
[root@fedorabox backup]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_fedorabox2-LogVol00
9.9G 5.2G 4.3G 55% /
tmpfs 2.0G 932K 2.0G 1% /dev/shm
/dev/sdb1 504M 56M 423M 12% /boot
/dev/mapper/vg_fedorabox2-LogVol03
394G 221G 153G 60% /home
/dev/mapper/vg_fedorabox2-LogVol02
99G 29G 65G 32% /shared
/dev/mapper/vg_fedorabox2-LogVol01
30G 11G 18G 37% /usr
/dev/sda2 5.5T 2.6T 3.0T 47% /mnt/root/usbbackup2
/dev/mapper/vg_fedorabox2-LogVol04
345G 363M 327G 1% /backup
like I said in the question, write speed is very slow:
[root@fedorabox backup]# dd if=/dev/zero of=/backup/tmp/test.out bs=512 count=32 oflag=dsync
32+0 records in
32+0 records out
16384 bytes (16 kB) copied, 40.382 s, 0.4 kB/s
[root@fedorabox backup]# dd of=/dev/null if=/backup/tmp/test.out bs=512 count=32 oflag=dsync
32+0 records in
32+0 records out
16384 bytes (16 kB) copied, 3.5087e-05 s, 467 MB/s
I can access the four drives using smartctl as /dev/sg2 through /dev/sg5. Output is listed below. I don't know what is normal reading for corrected errors here, but I note that the second and fourth drives (/dev/sg3, sg5) have listed uncorrected errors for reading and verifying.
Any advice on next steps - Are the uncorrected errors normal or worrisome? Is this the cause of the slowness, or is there something else I should be looking at?
Any advice on how to replace a drive and how to access the RAID configuration?
[root@fedorabox /]# smartctl -a /dev/sg2
smartctl 5.40 2010-10-16 r3189 [x86_64-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net
Device: SEAGATE ST1000NM0001 Version: PS06
Serial number: Z1N2LEDW
Device type: disk
Transport protocol: SAS
Local Time is: Mon Dec 19 12:10:20 2022 EST
Device supports SMART and is Enabled
Temperature Warning Disabled or Not Supported
Log Sense failed, IE page [scsi response fails sanity test]
Current Drive Temperature: 37 C
Drive Trip Temperature: 68 C
Manufactured in week 33 of year 2012
Specified cycle count over device lifetime: 10000
Accumulated start-stop cycles: 71
Elements in grown defect list: 36
Vendor (Seagate) cache information
Blocks sent to initiator = 2805494200
Blocks received from initiator = 1072424796
Blocks read from cache and sent to initiator = 19110177
Number of read and write commands whose size <= segment size = 826634038
Number of read and write commands whose size > segment size = 5264167
Vendor (Seagate/Hitachi) factory information
number of hours powered up = 11183.37
number of minutes until next internal SMART test = 43
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 3996823525 0 0 3996823525 0 130.509 0
write: 0 0 0 0 0 62619.327 0
verify: 1594450892 0 0 1594450892 0 51866.259 0
Non-medium error count: 9
SMART Self-test log
Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ]
Description number (hours)
# 1 Background short Completed 32 11182 - [- - -]
Long (extended) Self Test duration: 11100 seconds [185.0 minutes]
[root@fedorabox /]# smartctl -a /dev/sg3
smartctl 5.40 2010-10-16 r3189 [x86_64-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net
Device: SEAGATE ST31000424SS Version: KS68
Serial number: 9WK3JSJV
Device type: disk
Transport protocol: SAS
Local Time is: Mon Dec 19 12:10:44 2022 EST
Device supports SMART and is Enabled
Temperature Warning Disabled or Not Supported
Log Sense failed, IE page [scsi response fails sanity test]
Current Drive Temperature: 37 C
Drive Trip Temperature: 68 C
Manufactured in week 06 of year 2011
Specified cycle count over device lifetime: 10000
Accumulated start-stop cycles: 81
Specified load-unload count over device lifetime: 300000
Accumulated load-unload cycles: 81
Elements in grown defect list: 21
Vendor (Seagate) cache information
Blocks sent to initiator = 1872227385
Blocks received from initiator = 3603107317
Blocks read from cache and sent to initiator = 53905772
Number of read and write commands whose size <= segment size = 1041622488
Number of read and write commands whose size > segment size = 5288254
Vendor (Seagate/Hitachi) factory information
number of hours powered up = 77337.02
number of minutes until next internal SMART test = 16
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 1454822558 3 0 1454822561 1454822585 2465.838 21
write: 0 0 0 0 0 64012.923 0
verify: 2113323340 143 0 2113323483 2113323510 49057.393 17
Non-medium error count: 4
SMART Self-test log
Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ]
Description number (hours)
# 1 Background short Completed 16 643 - [- - -]
# 2 Background short Completed 16 5 - [- - -]
# 3 Background long Completed 16 5 - [- - -]
Long (extended) Self Test duration: 11100 seconds [185.0 minutes]
[root@fedorabox /]# smartctl -a /dev/sg4
smartctl 5.40 2010-10-16 r3189 [x86_64-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net
Device: SEAGATE ST31000424SS Version: KS68
Serial number: 9WK3H8DW
Device type: disk
Transport protocol: SAS
Local Time is: Mon Dec 19 12:11:02 2022 EST
Device supports SMART and is Enabled
Temperature Warning Disabled or Not Supported
Log Sense failed, IE page [scsi response fails sanity test]
Current Drive Temperature: 38 C
Drive Trip Temperature: 68 C
Manufactured in week 06 of year 2011
Specified cycle count over device lifetime: 10000
Accumulated start-stop cycles: 76
Specified load-unload count over device lifetime: 300000
Accumulated load-unload cycles: 76
Elements in grown defect list: 1
Vendor (Seagate) cache information
Blocks sent to initiator = 1437832391
Blocks received from initiator = 3080050213
Blocks read from cache and sent to initiator = 2689371046
Number of read and write commands whose size <= segment size = 3306395247
Number of read and write commands whose size > segment size = 5018225
Vendor (Seagate/Hitachi) factory information
number of hours powered up = 77337.17
number of minutes until next internal SMART test = 58
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 1514637706 1007 0 1514638713 1514638713 1576907.538 0
write: 0 0 0 0 0 61240.330 0
verify: 1697580124 32 0 1697580156 1697580157 48889.638 0
Non-medium error count: 27
SMART Self-test log
Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ]
Description number (hours)
# 1 Background short Completed 16 18 - [- - -]
# 2 Background short Completed 16 5 - [- - -]
# 3 Background long Completed 16 5 - [- - -]
Long (extended) Self Test duration: 11100 seconds [185.0 minutes]
[root@fedorabox /]# smartctl -a /dev/sg5
smartctl 5.40 2010-10-16 r3189 [x86_64-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net
Device: SEAGATE ST31000424SS Version: KS68
Serial number: 9WK3FCZ6
Device type: disk
Transport protocol: SAS
Local Time is: Mon Dec 19 12:11:41 2022 EST
Device supports SMART and is Enabled
Temperature Warning Disabled or Not Supported
Log Sense failed, IE page [scsi response fails sanity test]
Current Drive Temperature: 38 C
Drive Trip Temperature: 68 C
Manufactured in week 06 of year 2011
Specified cycle count over device lifetime: 10000
Accumulated start-stop cycles: 81
Specified load-unload count over device lifetime: 300000
Accumulated load-unload cycles: 81
Elements in grown defect list: 4096
Vendor (Seagate) cache information
Blocks sent to initiator = 923606853
Blocks received from initiator = 3074269061
Blocks read from cache and sent to initiator = 3237322768
Number of read and write commands whose size <= segment size = 3044372010
Number of read and write commands whose size > segment size = 5024782
Vendor (Seagate/Hitachi) factory information
number of hours powered up = 77336.67
number of minutes until next internal SMART test = 53
Error counter log:
Errors Corrected by Total Correction Gigabytes Total
ECC rereads/ errors algorithm processed uncorrected
fast | delayed rewrites corrected invocations [10^9 bytes] errors
read: 2058067359 277563 0 2058344922 2058345511 1420772.201 555
write: 0 0 0 0 0 62186.800 0
verify: 2750944424 2205 0 2750946629 2750946631 50834.359 1
Non-medium error count: 167
SMART Self-test log
Num Test Status segment LifeTime LBA_first_err [SK ASC ASQ]
Description number (hours)
# 1 Background short Completed 16 643 - [- - -]
# 2 Background short Completed 16 5 - [- - -]
# 3 Background long Completed 16 5 - [- - -]
Long (extended) Self Test duration: 11100 seconds [185.0 minutes]
