Write Timeouts with MPS

Tue Apr 10 21:13:48 UTC 2012

I am using Hitachi HDS72404 Revision: A250 Deskstar drives, on LSI SAS 9201-16e

----- Original Message -----
From: "Peter Maloney" <peter.maloney at brockmann-consult.de>
To: freebsd-scsi at freebsd.org
Sent: Tuesday, April 10, 2012 3:35:47 PM
Subject: Re: Write Timeouts with MPS

I found this only happens with specific disks / disk firmware... but
nobody seems to listen to me about it. They all seem to blame the
driver. (I blame both, but changing disks is a simple fix.)

And looking around, most reports are with various Seagates (including
one that can cause this type of error with smartctl -a with a SAS
Seagate, but cannot reproduce with the binary LSI driver) or Samsung
Spinpoints. The only other disk I know of that does this is a Crucial
SSD with old firmware. One guy said he can do a camcontrol rescan to get
it back; I tried that and get either panics, hangs, or nothing.

What HBA are you using? With my LSI 9211-8i HBAs, the new 3TB Seagate
greens don't seem to have this problem. I have no idea if different
disks behave differently with different controllers. I asked Seagate
about it and they reply with marketing nonsense about buying enterprise
disks instead, and say I should buy disks that are on the specific
compatibility list for the HBA.

I found that with the few disks that I have that fail randomly (and
others), I can reproduce the issue (not exact same symptoms though) by
hot pulling the disk while writing something, putting it back, wait a
few seconds (<10; less than enough for the SCSI controller to rescan)
pull and replace again. The old 2TB seagate greens fail this test, but
the 3TB ones pass. All 2 and 3 TB Hitachis I tried pass this test, as
well as 3TB WD greens. (all enterprise disks I tried pass this test
except the Toshiba 2TB ones I tried)

If I put a "failed" disk back in, it does not work. If I put it in a
different slot, same. But if I put any other disk in, it works fine. So
it is the disk, but it is also FreeBSD not being able to reset/rescan
it. But it is simple enough to blame both, and since you can't get rid
of the driver, get different disks (eg. swap them with some different
same sized ones in a different machine).

Here is my forum thread about it, including disk product ids for ones I
tested, and a huge list of things that don't fix it.
http://forums.freebsd.org/showthread.php?t=28252

Peter

On 10.04.2012 03:52, John Hickey wrote:
> I've seen people having this problem before, but I don't think anyone
> has figured it out.  I am running:
>
> FreeBSD zfs 10.0-CURRENT FreeBSD 10.0-CURRENT #5: Sat Apr  7 18:05:57 PDT 2012     root at zfs:/usr/obj/usr/src/sys/GENERIC  amd64
>
> I have the latest LSI IT firmware 13 loaded:
>
> mps1: <LSI SAS2008> port 0xc000-0xc0ff mem 0xfe93c000-0xfe93ffff,0xfe940000-0xfe97ffff irq 16 at device 0.0 on pci5
> mps1: Firmware: 13.00.01.00, Driver: 13.00.00.00-fbsd
> mps1: IOCCapabilities: 1285c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,EventReplay,HostDisc>
>
> All disks are on a SuperMicro SAS II backplane:
>
> root at zfs:/usr/ports/sysutils/dmidecode# camcontrol devlist
> <SEAGATE ST3300657SS 0008>         at scbus0 target 0 lun 0 (da0,pass0)
> <SEAGATE ST3300657SS 0008>         at scbus0 target 1 lun 0 (da1,pass1)
> <SEAGATE ST2000NM0001 0001>        at scbus1 target 8 lun 0 (da2,pass2)
> .... x16 more of the same
> <SEAGATE ST2000NM0001 0001>        at scbus1 target 46 lun 0 (da20,pass20)
> <LSI CORP SAS2X36 0717>            at scbus1 target 47 lun 0 (ses0,pass21)
>
> Essentially when putting the ZFS filesystem under load, I am getting
> these sorts of errors:
>
> (da13:mps1:0:21:0): WRITE(10). CDB: 2a 0 19 29 32 f2 0 1 0 0 length 131072 SMID 213 terminated ioc 804b scsi 0 state c xfer 0
> (da7:mps1:0:13:0): WRITE(10). CDB: 2a 0 19 3d fa ae 0 1 0 0 length 131072 SMID 386 terminated ioc 804b scsi 0 state c xfer 0
> (da11:mps1:0:18:0): WRITE(10). CDB: 2a 0 18 a 24 ee 0 1 0 0 length 131072 SMID 542 terminated ioc 804b scsi 0 state c xfer 0
> (da14:mps1:0:22:0): WRITE(10). CDB: 2a 0 19 2a c6 b1 0 1 0 0 length 131072 SMID 214 terminated ioc 804b scsi 0 state c xfer 0
> (da16:mps1:0:25:0): WRITE(10). CDB: 2a 0 19 2b 83 aa 0 1 0 0 length 131072 SMID 879 terminated ioc 804b scsi 0 state c xfer 0
> (da7:mps1:0:13:0): WRITE(10). CDB: 2a 0 19 40 d f9 0 1 0 0 length 131072 SMID 474 terminated ioc 804b scsi 0 state c xfer 0
> (da9:mps1:0:15:0): WRITE(10). CDB: 2a 0 18 c 3 31 0 1 0 0 length 131072 SMID 578 terminated ioc 804b scsi 0 state c xfer 0
> (da4:mps1:0:10:0): WRITE(10). CDB: 2a 0 19 41 6f ff 0 1 0 0 length 131072 SMID 703 terminated ioc 804b scsi 0 state c xfer 0
> (da12:mps1:0:19:0): WRITE(10). CDB: 2a 0 18 c e5 2e 0 1 0 0 length 131072 SMID 684 terminated ioc 804b scsi 0 state c xfer 0
> (da3:mps1:0:9:0): WRITE(10). CDB: 2a 0 19 41 b1 4b 0 1 0 0 length 131072 SMID 212 terminated ioc 804b scsi 0 state c xfer 0
> (da9:mps1:0:15:0): WRITE(10). CDB: 2a 0 18 d 1e 5c 0 1 0 0 length 131072 SMID 63 terminated ioc 804b scsi 0 state c xfer 0
> (da11:mps1:0:18:0): WRITE(10). CDB: 2a 0 18 d 56 1c 0 1 0 0 length 131072 SMID 412 terminated ioc 804b scsi 0 state c xfer 0
> (da4:mps1:0:10:0): WRITE(10). CDB: 2a 0 19 42 2c f1 0 1 0 0 length 131072 SMID 1019 terminated ioc 804b scsi 0 state c xfer 0
> (da11:mps1:0:18:0): WRITE(10). CDB: 2a 0 18 d 6d 22 0 1 0 0 length 131072 SMID 175 terminated ioc 804b scsi 0 state c xfer 0
> (da7:mps1:0:13:0): WRITE(10). CDB: 2a 0 19 42 62 bc 0 1 0 0 length 131072 SMID 458 terminated ioc 804b scsi 0 state c xfer 0
> (da10:mps1:0:16:0): WRITE(10). CDB: 2a 0 18 f 4b d2 0 1 0 0 length 131072 SMID 986 terminated ioc 804b scsi 0 state c xfer 0
> (da3:mps1:0:9:0): WRITE(10). CDB: 2a 0 19 43 f4 50 0 1 0 0 length 131072 SMID 809 terminated ioc 804b scsi 0 state c xfer 0
> (da2:mps1:0:8:0): WRITE(10). CDB: 2a 0 19 45 4 18 0 1 0 0 length 131072 SMID 998 terminated ioc 804b scsi 0 state c xfer 0
> (da13:mps1:0:21:0): WRITE(10). CDB: 2a 0 19 30 e4 73 0 1 0 0 length 131072 SMID 489 terminated ioc 804b scsi 0 state c xfer 0
> (da12:mps1:0:19:0): WRITE(10). CDB: 2a 0 18 10 8d 19 0 1 0 0 length 131072 SMID 275 terminated ioc 804b scsi 0 state c xfer 0
> (da14:mps1:0:22:0): WRITE(10). CDB: 2a 0 19 32 e7 0 0 1 0 0 length 131072 SMID 666 terminated ioc 804b scsi 0 state c xfer 0
> (da8:mps1:0:14:0): WRITE(10). CDB: 2a 0 18 13 2b 68 0 1 0 0 length 131072 SMID 463 terminated ioc 804b scsi 0 state c xfer 0
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