2.6.19-rc1 scanning a ghost dvd drive at boot

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Hello,

trying libata with 2.6.19-rc1 produced the follwing at startup:

ata6.00: ATAPI, max UDMA/3
ata6.01: qc timeout (cmd 0xa1)
ata6.01: failed to IDENTIFY (I/O error, err_mask=0x4)
ata6: failed to recover some devices, retrying in 5 secs
ata6.01: qc timeout (cmd 0xa1)
ata6.01: failed to IDENTIFY (I/O error, err_mask=0x4)
ata6: failed to recover some devices, retrying in 5 secs
ata6.01: qc timeout (cmd 0xa1)
ata6.01: failed to IDENTIFY (I/O error, err_mask=0x4)
ata6: failed to recover some devices, retrying in 5 secs

I have nvidia chipset and therefore use pata_amd and sata_nv.
The DVD/RW drive is the only drive on ata6.
The harddisk on ata5 is recognized without problems.

After the above 3 attempts to scan ata6.01 the boot process
continued normally and all drives are working fine (HD and DVD).
It seem that libata thinks there is a drive on ata6.01 but there is none
(->Ghosting?).

I figured there were such issues earlier with other chipset. Is there
something to do about it?


Regards

		Michael
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