Messages in this thread |  | | | Date | Sat, 5 Aug 2006 21:23:46 +0000 | | From | Pavel Machek <> | | Subject | Re: 2.6.18-rc2, problem to wake up spinned down drive? |
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Hi!
> >ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action > >0x2 frozen > >ata1.00: (BMDMA stat 0x20) > >ata1.00: tag 0 cmd 0xca Emask 0x4 stat 0x40 err 0x0 > >(timeout) > >ata1: port is slow to respond, please be patient > >ata1: port failed to respond (30 secs) > >ata1: soft resetting port > >ata1.00: configured for UDMA/133 > >ata1: EH complete > >SCSI device sda: 312581808 512-byte hdwr sectors > >(160042 MB) > >sda: Write Protect is off > >sda: Mode Sense: 00 3a 00 00 > >SCSI device sda: drive cache: write back > > > >The disk is a SAMSUNG SP1614C. > > > >On another machine (with a SAMSUNG SP2504C inside) > >there is no > >such problem: The disk is back after just a few seconds. > > In standby mode, the drive's interface and state > machines stay online and are supposed to spin up and > process the command when it receives one. The above > message is printed because an IO command hasn't finished > in 30 secs meaning that it didn't wake up when it should > have. The drive seems to act incorrectly. > > >Is there some trick to wake up the disk a little bit > >faster? > > Can you try the following instead of hdparm? > > echo 1 > /sys/bus/scsi/devices/1:0:0:0/power/state
Really? I thought power/state takes 0/3 (for D0 and D3)
Pavel -- Thanks for all the (sleeping) penguins. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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