On Tue, Jul 03, 2007 at 04:26:31PM +0900, Tejun Heo wrote: > William Thompson wrote: > > I'm not on either list, keep me in CC. > > > > I noticed the following error on a cdrom device: > > ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen > > ata2.00: cmd a0/00:00:00:00:20/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0 > > res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout) > > ata2: soft resetting port > > ata2.00: configured for MWDMA2 > > ata2: EH complete > > > > This is the device when it was found: > > libata version 2.00 loaded. > > ata_piix 0000:00:1f.1: version 2.00ac7 > > ata1: PATA max UDMA/100 cmd 0x1F0 ctl 0x3F6 bmdma 0xFFA0 irq 14 > > ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xFFA8 irq 15 > > scsi0 : ata_piix > > ata1.00: ATA-4, max UDMA/66, 16514064 sectors: LBA > > ata1.00: ata1: dev 0 multi count 8 > > ata1.00: configured for UDMA/66 > > scsi1 : ata_piix > > ata2.00: ATAPI, max MWDMA2 > > ata2.00: configured for MWDMA2 > > scsi 0:0:0:0: Direct-Access ATA WDC WD84AA 05.0 PQ: 0 ANSI: 5 > > scsi 1:0:0:0: CD-ROM LITEON CD-ROM LTN486S YQSM PQ: 0 ANSI: 5 > > > > I have a program that does a scsi TEST UNIT READY on many devices once every > > .1 second. The problem occured when I ejected the cdrom and closed the tray > > again with valid media in the drive. My program noticed media removed and > > inserted, then said the device was dead/unpollable. This is when I saw this > > error. > > Your cd rom failed to complete the TUR command your program issued in > the specified timeout. ODDs sometimes take quite long to finish TUR or > any other command when media is changed. Did you use sg command or > cdrom ioctl? I'm using SG_IO. I also tested sg3-utils' sg_tur which gave me the same thing. Is it just a crappy cdrom? > Anyways, after timing out, libata EH kicked the cdrom in the ass and > world peace is restored. Ah, that's good. - 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
