Messages in this thread | | | Subject | CD-ROM ide-dma blacklist amnesty drive | From | Junio C Hamano <> | Date | Wed, 08 Dec 2004 16:33:56 -0800 |
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Alexander E. Patrakov wrote:
>The "SAMSUNG CD-ROM SC-148F" drive is listed in drive_blacklist in >ide-dma.c. However, this drive worked well with DMA enabled with earlier >kernel versions (<=2.6.8.1) where the "via82cxxx" driver did not look at >this blacklist. So the question: what was the reason for blacklisting this >(apparently working) drive? Is it still valid?
This was discussed about two months ago without a firm resolution as far as I can tell, in this thread:
http://thread.gmane.org/gmane.linux.kernel/241862
Especially from Jens and Alan:
http://article.gmane.org/gmane.linux.kernel/242226 http://article.gmane.org/gmane.linux.kernel/242228
I've been meaning to start a "CD-ROM ide-dma blacklist amnesty drive" ;-) The intent is to gather comments from owners of blacklisted drives to see if those models still deserve to be on the blacklist.
As for myself, I would vote for removing "PLEXTOR CD-R PX-W8432T" (at least firmware "1.09") from the list. This model seems to work fine with DMA. As Alexander does, I have been running it on VIA motherboard which only recently started looking at the ide-dma blacklist without trouble; that is, before via82cxxx started caring.
The following is a list of CD drives blacklisted (I've removed hard-disks and flash from the list) in drivers/ide/ide-dma.c as of 2.6.10-rc3:
Compaq CRD-8241B CRD-8400B CRD-8480B CRD-8480C CRD-8482B CRD-84 SANYO CD-ROM CRD HITACHI CDR-8 HITACHI CDR-8335 HITACHI CDR-8435 Toshiba CD-ROM XM-6202B CD-532E-A E-IDE CD-ROM CR-840 CD-ROM Drive/F5A WPI CDD-820 SAMSUNG CD-ROM SC-148C SAMSUNG CD-ROM SC-148F SAMSUNG CD-ROM SC SAMSUNG CD-ROM SN-124 PLEXTOR CD-R PX-W8432T ATAPI CD-ROM DRIVE 40X MAXIMUM _NEC DV5800A
If (1) you are a owner of one of the listed drives, and (2) you know your drive works fine with DMA, please speak up. It would especially be a big plus if your drive is on via82cxxx and did not have any trouble running it with DMA before 2.6.8.
Thanks.
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