Messages in this thread | | | Date | Tue, 17 Jul 2007 00:08:28 -0600 | From | Robert Hancock <> | Subject | Re: sata_nv: 2.6.22 is not fixed, but certainly improved |
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Robert Hancock wrote: > Can you post the output you got from the reset on 2.6.22?
It's one of these:
ata4: EH in ADMA mode, notifier 0x0 notifier_error 0x0 gen_ctl 0x1501000 status 0x400 next cpb count 0x0 next cpb idx 0x0 ata4: CPB 0: ctl_flags 0x9, resp_flags 0x0 ata4: timeout waiting for ADMA IDLE, stat=0x400 ata4: timeout waiting for ADMA LEGACY, stat=0x400 ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen ata4.00: cmd e7/00:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0 res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) ata4: soft resetting port ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata4.00: configured for UDMA/133 ata4: EH complete sd 5:0:0:0: [sdb] 156301488 512-byte hardware sectors (80026 MB) sd 5:0:0:0: [sdb] Write Protect is off sd 5:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Essentially the controller has been given a command (a cache flush, which for whatever reason seems to cause this frequently) but it doesn't give any indication that it has done anything with it (CPB response flags remain at 0). There have been a few reports of this, and I'm at a loss to explain why it happens. Certainly the publicly known information on this controller doesn't seem to give any hints on what if anything we could be doing wrong.
A workaround was added in sata_nv a while back that adds a delay between completion of an NCQ command and issuing of a non-NCQ command, or vice versa. This seems to have improved things (for unknown reasons), but hasn't entirely fixed the problem. If your drive has NCQ support, it may be a remaining case of this problem.
I've previously asked for info on this issue from NVIDIA (as well as Jeff Garzik who has access to the controller documentation), but haven't gotten any info yet. Consider this another ping :-)
-- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/
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