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Subjectproblems with Seagate 120 GB drives when mutlwrite = 16
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Date
Hi,

I have noticed some problems with recent large drives, connected to a
variety of controllers.

I tested with nforce ide controller, a CMD649 based controller and an
Intel 870 cghipset. all have same or similar symptoms.

Linux 2.4.22 kernel : (Linux borg-cube 2.4.22-xfs #2 SMP Tue Oct 7
20:53:04 CEST 2003 i686 unknown)

Oct 6 15:52:12 borg-cube kernel: hdg: dma_timer_expiry: dma status ==
0x21
Oct 6 15:52:22 borg-cube kernel: hdg: timeout waiting for DMA
Oct 6 15:52:22 borg-cube kernel: hdg: timeout waiting for DMA
Oct 6 15:52:22 borg-cube kernel: hdg: status error: status=0x58 {
DriveReady SeekComplete DataRequest }
Oct 6 15:52:22 borg-cube kernel:
Oct 6 15:52:22 borg-cube kernel: hdg: drive not ready for command
Oct 6 15:52:22 borg-cube kernel: hdg: status timeout: status=0xd0 {
Busy }
Oct 6 15:52:22 borg-cube kernel:
Oct 6 15:52:22 borg-cube kernel: hdg: no DRQ after issuing WRITE
Oct 6 15:52:22 borg-cube kernel: ide3: reset: success

same in 2.4.20 ( kernel from Suse)

2.6.0-test6 :

Oct 9 09:43:09 borg-cube kernel: hdg: dma_timer_expiry: dma status ==
0x21
Oct 9 09:43:18 borg-cube kernel:
Oct 9 09:43:19 borg-cube kernel: hdg: DMA timeout error
Oct 9 09:43:19 borg-cube kernel: hdg: dma timeout error: status=0x58 {
DriveReady SeekComplete DataRequest }
Oct 9 09:43:19 borg-cube kernel:
Oct 9 09:43:19 borg-cube kernel: hdg: status timeout: status=0xd0 {
Busy }
Oct 9 09:43:19 borg-cube kernel:
Oct 9 09:43:19 borg-cube kernel: hdg: no DRQ after issuing MULTWRITE
Oct 9 09:43:20 borg-cube kernel: ide3: reset: success

same in 2.6.0-test8

so behaviour is consistent.

I can avoid this with either turning off dma access or disabling the
multwrite ( hdparm -m0 /dev/hdg)

is this a known bug, or should I file one ?

kind regards, Kris

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