Tejun Heo schrieb:
Tomasz Chmielewski wrote:
Joris schrieb:
Hello Tomasz,
This appears remarkably simelar to what I'm experiencing, altough I'm
getting that on sata ports.
I'm currently at a loss on what caused this, but if there's two of
us... ;-)
See: http://marc.info/?l=linux-ide&m=118812690407577&w=2
What kind of hardware are you running?
It's a dual core Xeon.
Root filesystem starts off a 2 GB Transcend IDE flash disk, and there is
a 4-disk RAID-10 array behind a hardware RAID, with LVM on it.
I noticed it doesn't soft reset anymore once the kernel said:
ata1.00: limiting speed to MWDMA1:PIO4
Aieee... MWDMA2 brokenness again. cc'ing Jeff and Alan for the record.
BTW, is there a way to force such a device to work in MWDMA1? So that I
could add it to the startup scripts?
It's the -X option to hdparm, right? However, I can't get it to work.
This is a part of my hdparm -I output:
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 2.0kB bytes avail on r/w long: 4
Standby timer values: spec'd by Vendor
R/W multiple sector transfer: Max = 1 Current = 1
DMA: not supported
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
And this is a part of dmesg output when the machine seems to freeze as
it resets the device:
(...)
ata1: soft resetting port
ata1.00: configured for MWDMA2
ata1: EH complete
sd 0:0:0:0: [sda] 3985632 512-byte hardware sectors (2041 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
ata1.00: limiting speed to MWDMA1:PIO4
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: cmd ca/00:00:87:21:1a/00:00:00:00:00/e0 tag 0 cdb 0x0 data
131072 out
res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
ata1: port is slow to respond, please be patient (Status 0xd0)
ata1: device not ready (errno=-16), forcing hardreset
ata1: soft resetting port
ata1.00: configured for MWDMA1
ata1: EH complete
sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't
support DPO or FUA
sd 0:0:0:0: [sda] 3985632 512-byte hardware sectors (2041 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't
support DPO or FUA
However:
# hdparm -X mdma1 /dev/sda
/dev/sda:
setting xfermode to 33 (multiword DMA mode1)
HDIO_DRIVE_CMD(setxfermode) failed: Input/output error
# hdparm -X 12 /dev/sda
/dev/sda:
setting xfermode to 12 (PIO flow control mode4)
HDIO_DRIVE_CMD(setxfermode) failed: Input/output error
--
Tomasz Chmielewski
http://wpkg.org
-
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
