linux-scsi cc re-added, please don't drop ... others may know more than me. On Tue, 2010-09-14 at 13:35 +0100, Lee Jones wrote: > On 14/09/10 13:18, James Bottomley wrote: > > On Tue, 2010-09-14 at 12:27 +0100, Lee Jones wrote: > >> A bug as been reported me to where some DVD-RW drives are unable to > >> detect blank DVDs. Apparently this is a regression issue, as the > >> reporting user is insisting that they used to be able to burn DVDs > >> using the same hardware. > >> > >> The reporting user provided this dmesg output. I believe they tried a > >> few different disks to gain this response. > > > > You neglected to say what kernel? I assume 2.6.35 > > The same results have been seen in 2.6.32 and 2.6.35. OK, I'd still lay better odds on a burner program problem ... but since it's so old, a bisection is likely needed. Which kernel actually worked? James > >> I am pasting dmesg output from these attempts: > >> [ 3563.989601] sr 5:0:1:0: [sr0] Unhandled sense code > >> [ 3563.989606] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE > >> [ 3563.989609] sr 5:0:1:0: [sr0] Sense Key : Medium Error [current] > >> [ 3563.989614] sr 5:0:1:0: [sr0] ASC=0x10 <<vendor>> ASCQ=0x90 > >> [ 3563.989621] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 05 6f 60 00 00 02 00 > >> [ 3563.989629] end_request: I/O error, dev sr0, sector 1424768 > >> [ 3563.989633] quiet_error: 3 callbacks suppressed > >> [ 3563.989636] Buffer I/O error on device sr0, logical block 178096 > >> [ 3607.084661] sr 5:0:1:0: [sr0] Device not ready > >> [ 3607.084665] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE > >> [ 3607.084669] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] > >> [ 3607.084673] sr 5:0:1:0: [sr0] Add. Sense: Medium not present > >> [ 3607.084677] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 > >> [ 3607.084685] end_request: I/O error, dev sr0, sector 120 > >> [ 3607.084690] Buffer I/O error on device sr0, logical block 15 > >> [ 3607.090021] sr 5:0:1:0: [sr0] Device not ready > >> [ 3607.090023] sr 5:0:1:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE > >> [ 3607.090026] sr 5:0:1:0: [sr0] Sense Key : Not Ready [current] > >> [ 3607.090029] sr 5:0:1:0: [sr0] Add. Sense: Medium not present > >> [ 3607.090032] sr 5:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 1e 00 00 02 00 > >> [ 3607.090039] end_request: I/O error, dev sr0, sector 120 > > > > So these are all direct pass throughs. That likely means the problem is > > in the setup on the burner. If there's some filesystem above this, > > there was a Read/Write flag error in blk_rq_map_kern ... but that was > > introduced in 2.6.36-rc1. > > > > The only recent changes to sr were the BLK pushdown and they were post > > 2.6.35. > > > > James > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
