[202012][Arista] Disable ATA NCQ for a few products #13803
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prgeor
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Mar 6, 2023
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@lguohan please help merge |
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@qiluo-msft is the 202012 branch owner |
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…202012 to internal-202012 Merge the commits from sonic-net/sonic-buildimage 202012 to internal-202012 Related work items: sonic-net#279, sonic-net#2666, sonic-net#2686, sonic-net#2692, sonic-net#12684, sonic-net#13803, sonic-net#13805, sonic-net#13911, sonic-net#13926, sonic-net#13930, sonic-net#13992, sonic-net#14006, sonic-net#14009, sonic-net#14012, sonic-net#14013, sonic-net#14025, sonic-net#14056, sonic-net#14066, sonic-net#14080, sonic-net#14111, sonic-net#14137, sonic-net#14138, sonic-net#14171, sonic-net#14202, sonic-net#14205, sonic-net#14220, sonic-net#14241
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Why I did it
Some products might experience an occasional IO failure in the communication between CPU and SSD.
Based on some research it could be attributable to some device not handling ATA NCQ (Native Command Queue).
This issue currently affect 4 products:
DCS-7170-32C*DCS-7170-64CDCS-7060DX4-32DCS-7260CX3-64How I did it
This change disable NCQ on the affected drive for a small set of products.
How to verify it
When the fix is applied, these 2 patterns can be found in the dmesg.
ata1.00: FORCE: horkage modified (noncq)NCQ (not used)Test results using:
fio --direct=1 --rw=randrw --bs=64k --ioengine=libaio --iodepth=64 --runtime=120 --numjobs=4with NCQ (
ata1.00: 61865984 sectors, multi 1: LBA48 NCQ (depth 32), AA)without NCQ (
ata1.00: 61865984 sectors, multi 1: LBA48 NCQ (not used))Description for the changelog
Disable ATA NCQ for a few Arista products