Re: Linux 2.4.25-pre7 - no DRQ after issuing WRITE

Bartlomiej Zolnierkiewicz
2004-02-04T17:58:24Z

On Wednesday 04 of February 2004 16:29, Gabor Z. Papp wrote:
> * Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>:
> | Dunno :-). I use smartmontools and non-Linux vendor tools
> | (ie. from www.seagate.com) to make sure that drive is okay.
> | If these tests pass and drive works with other OS-es then
> | I suspect bug in IDE core or in specific IDE chipset driver.
>
> Downloaded the seagate seatools, and ran the full tests.
>
> The diagnostic tool told me I have to send back the disk...
>
> DST - Errors - Status: 07
> Short Test Failed: [date]
>
> BAD Sector LBA: 125249531
> Unable to resolve sector usage.
>
> [lot of such errors for various sectors]
>
> Scan Completed... PROBLEMS FOUND.
>
> So, "no DRQ after issuing WRITE" is due these drive errors?

Yes, when DMA write fails (ie. because of a bad sector), driver disables
DMA and tries to retry transfer in PIO mode but obviously that fails too
(drive doesn't "ack" PIO write command and thus this message).