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sdauth
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Joined: 19 Sep 2018
Posts: 650
Location: Ásgarðr
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 Posted: Wed Jun 26, 2024 11:01 pm Post subject: SAS HBA, random drive reset under load, io scheduler issue ? |
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Hello,
I have a server with 8 hdd attached to a SAS HBA (Dell Perc H310 with IT firmware), no raid is used : for each hard disk, a filesystem and a mountpoint.
When the system is under high load with lot of r/w, I have a disk (not the same each time !) which reset itself for no reason.
This time it was /dev/sdg, when it happened, I was running a (long) smart test on 4 drives and started a copy to an other disk. /dev/sdg was totally idle..
Other than that, the airflow is good, temp are ok and I already replaced the mini sas and power cables.. 
| Code: | [111738.379589] sd 0:0:6:0: device_block, handle(0x000f)
[111740.379542] sd 0:0:6:0: device_unblock and setting to running, handle(0x000f)
[111740.406332] sd 0:0:6:0: [sdg] Synchronizing SCSI cache
[111740.406369] sd 0:0:6:0: [sdg] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[111740.407030] mpt2sas_cm0: mpt3sas_transport_port_remove: removed: sas_addr(0x4433221106000000)
[111740.407040] mpt2sas_cm0: removing handle(0x000f), sas_addr(0x4433221106000000)
[111740.407044] mpt2sas_cm0: enclosure logical id(0x5d8ae120b146b700), slot(5)
[111758.130732] mpt2sas_cm0: handle(0xf) sas_address(0x4433221106000000) port_type(0x1)
[111758.385681] scsi 0:0:8:0: Direct-Access ATA WDC WD180EDGZ-11 0A85 PQ: 0 ANSI: 6
[111758.385704] scsi 0:0:8:0: SATA: handle(0x000f), sas_addr(0x4433221106000000), phy(6), device_name(0x0000000000000000)
[111758.385707] scsi 0:0:8:0: enclosure logical id (0x5d8ac140b146b500), slot(5)
[111758.385808] scsi 0:0:8:0: atapi(n), ncq(y), asyn_notify(n), smart(y), fua(y), sw_preserve(y)
[111758.385812] scsi 0:0:8:0: qdepth(32), tagged(1), scsi_level(7), cmd_que(1)
[111758.454308] sd 0:0:8:0: Power-on or device reset occurred
[111758.455266] sd 0:0:8:0: Attached scsi generic sg6 type 0
[111758.457603] sd 0:0:8:0: [sdj] 35156656128 512-byte logical blocks: (18.0 TB/16.4 TiB)
[111758.457611] sd 0:0:8:0: [sdj] 4096-byte physical blocks
[111758.475549] end_device-0:8: add: handle(0x000f), sas_addr(0x4433221106000000)
[111758.481002] sd 0:0:8:0: [sdj] Write Protect is off
[111758.481011] sd 0:0:8:0: [sdj] Mode Sense: 7f 00 10 08
[111758.487995] sd 0:0:8:0: [sdj] Write cache: enabled, read cache: enabled, supports DPO and FUA
[111758.561591] sdj: sdj1
[111758.561773] sd 0:0:8:0: [sdj] Attached SCSI disk |
Can it be related to the io scheduler used (MQ_IOSCHED_DEADLINE) ? Should I switch to BFQ ? Any idea or tip to troubleshoot this ?
Last edited by sdauth on Fri Jun 28, 2024 9:16 am; edited 1 time in total |
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sdauth
l33t
Joined: 19 Sep 2018
Posts: 650
Location: Ásgarðr
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| Posted: Thu Jun 27, 2024 7:44 am Post subject: |
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I recompiled my kernel with BFQ built-in and added this udev rule :
/etc/udev/rules.d/60-ioschedulers.rules
| Code: | # HDD
ACTION=="add|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
# SSD
ACTION=="add|change", KERNEL=="sd[a-z]*|mmcblk[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="bfq" |
grep "" /sys/block/*/queue/scheduler
| Code: | /sys/block/sda/queue/scheduler:none [bfq]
/sys/block/sdb/queue/scheduler:none [bfq]
/sys/block/sdc/queue/scheduler:none [bfq]
/sys/block/sdd/queue/scheduler:none [bfq]
/sys/block/sde/queue/scheduler:none [bfq]
/sys/block/sdf/queue/scheduler:none [bfq]
/sys/block/sdg/queue/scheduler:none [bfq]
/sys/block/sdh/queue/scheduler:none [bfq]
/sys/block/sdi/queue/scheduler:none [bfq] |
Looks good.
Right now, I'm finishing copying a lot of files to a drive, so far so good. But there isn't too much stress for now. Once done, I will start again an extended smart test on the four previous drives and stress the card a little with some file copy between disks to see if the problem happens again.
On the other hand, I wonder if the Dell Perc H310 isn't just overheating. There is no sensor for the card but last time I powered off this server, the card was hot as hell. Unfortunately I can't mount a fan on it because of a usb3 pci express card just below in a pcie-x1 slot. Maybe I can mount a 120mm fan to the panel of the case to push some air on the pcie slots though. |
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sdauth
l33t
Joined: 19 Sep 2018
Posts: 650
Location: Ásgarðr
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| Posted: Fri Jun 28, 2024 1:39 pm Post subject: |
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| Switching to bfq io scheduler instead of mq-deadline seems to does wonders. Almost 48hours uptime with concurrent smart test (1 drive still not finished..) and various rsync (local and remote) copy on different hdd and not a single drive reset yet. |
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