From linux-kernel Mon Aug 13 14:50:08 2007 From: Niels Date: Mon, 13 Aug 2007 14:50:08 +0000 To: linux-kernel Subject: Re: Problems with USB disk [solved] Message-Id: X-MARC-Message: https://marc.info/?l=linux-kernel&m=118702232321861 On Sunday 12 August 2007 11:54, Niels wrote: > On Friday 10 August 2007 14:43, Niels wrote: > >> On Wednesday 08 August 2007 12:57, Ismail Dönmez wrote: >> >>> On Wednesday 08 August 2007 13:48:29 you wrote: >>>> On Tuesday 07 August 2007 23:18, Greg KH wrote: >>>> > On Tue, Aug 07, 2007 at 10:26:15PM +0200, Niels wrote: >>>> >> Hi, >>>> >> >>>> >> I'm having problems with a new 500 GB USB disk. It works, but >>>> >> sometimes I get these in dmesg: >>>> >> >>>> >> >>>> >> usb 1-3: reset high speed USB device using ehci_hcd and address 2 >>>> >> usb 5-1: USB disconnect, address 2 >>>> >> drivers/usb/class/usblp.c: usblp0: removed >>>> >> sd 0:0:0:0: Device not ready: <6>: Sense Key : 0x2 [current] >>>> >> >>>> >> : ASC=0x4 ASCQ=0x2 >>>> >> >>>> >> end_request: I/O error, dev sda, sector 254148215 >>>> >> sd 0:0:0:0: Device not ready: <6>: Sense Key : 0x2 [current] >>>> >> >>>> >> : ASC=0x4 ASCQ=0x2 >>>> >> >>>> >> end_request: I/O error, dev sda, sector 252434023 >>>> >> EXT3-fs error (device sda1): ext3_find_entry: reading directory >>>> >> #15761836 offset 0 >>>> >> >>>> >> >>>> >> There's also a printer connected. This is on a pci/usb2 card. When >>>> >> the above happens, I get I/O errors. When I mount the drive next, >>>> >> there are errors and often missing files. Quite annoying! >>>> >> >>>> >> Kernel is 2.6.21 >>>> >> >>>> >> What's going on? >>>> > >>>> > You have a low voltage issue, or a bad cable. The device is >>>> > electronically disconnecting itself. Try using a externally-powered >>>> > hub, or a new cable. >>> >>> I am seeing a similar problem with 2.6.22 and 2.6.23-* kernels with my >>> 60G iPod Video, works fine with 2.6.18 kernel though. >>> >>> Rehards, >>> ismail >>> >> >> (no need to CC me) >> >> So far I'm seeing this: >> >> - On 2.6.21 I mount the drive. After a while it spins down, and when I >> then unmount it, an error pops up in dmesg. >> >> - On 2.6.18 I can't provoke the same error. The drive doesn't appear to >> spin down. I don't know if the data corruption from 2.6.21 occurs with >> regular use. >> >> There are a number of other factor I need to eliminate on my system, but >> that's it so far. CONFIG_USB_SUSPEND is not set on either kernel. >> >> >> //Niels > > > OK, on a vanilla 2.6.18.8 I also have this problem, with both the pci/usb2 > card, and the usb1 on the board. I listen to music from the drive, and > after some time (10-20 minutes or so), it freaks out: > > ========= > sd 1:0:0:0: Device not ready: <6>: Current: sense key=0x2 > ASC=0x4 ASCQ=0x2 > end_request: I/O error, dev sda, sector 126693711 > sd 1:0:0:0: Device not ready: <6>: Current: sense key=0x2 > ASC=0x4 ASCQ=0x2 > end_request: I/O error, dev sda, sector 126693711 > sd 1:0:0:0: Device not ready: <6>: Current: sense key=0x2 > ASC=0x4 ASCQ=0x2 > end_request: I/O error, dev sda, sector 126693711 > ========= > > Will updating to 2.6.23 and turning off autosuspend explicitly help? Will > putting the disk on a powered hub help? > > > //Niels Using a new PSU and a powered hub made no difference. But I found a solution here: http://alienghic.livejournal.com/382903.html Basically, the problem is, as suspected, that the drive spins down / goes to suspend. This can be disabled with "sdparm --clear STANDBY -6 /dev/sda". It seems to me to be an error that the kernel reports this as something like a hardware failure. Or at least very misleading. //Niels - 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/