Messages in this thread | | | Subject | Re: [PATCH] libsas: support NCQ for SATA disks | From | James Bottomley <> | Date | Sun, 15 Oct 2006 12:42:03 -0500 |
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On Fri, 2006-10-13 at 16:56 -0700, Darrick J. Wong wrote: > I've tested this patch on a x206m with a ST380819AS SATA2 disk plugged > into the Adaptec SAS controller. The drive came up with a queue depth > of 31, and I successfully ran an I/O flood test to coerce libata into > sending multiple commands simultaneously. A kernel probe recorded the > maximum tag number that had been seen before and after the flood test; > before the test it was 2 and after it was 30, as I expected.
This doesn't seem to quite work for me on a SATA-1 disc:
sas: DOING DISCOVERY on port 1, pid:1897 sas: sas_ata_phy_reset: Found ATA device. ata1.00: ATA-7, max UDMA/133, 781422768 sectors: LBA48 NCQ (depth 31/32) ata1.00: configured for UDMA/133 scsi 2:0:1:0: Direct-Access ATA ST3400832AS 3.03 PQ: 0 ANSI: 5 SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) sdc: Write Protect is off SCSI device sdc: drive cache: write back SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) sdc: Write Protect is off SCSI device sdc: drive cache: write back sdc: unknown partition table sd 2:0:1:0: Attached scsi disk sdc sas: DONE DISCOVERY on port 1, pid:1897, result:0 sas: command 0xf785f3c0, task 0x00000000, timed out: EH_HANDLED sas: command 0xf785f3c0, task 0x00000000, timed out: EH_HANDLED [...]
It looks like the first few commands get through (read capacity, ATA IDENTIFY etc) and it hangs up on the read for the partition table.
James
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