Messages in this thread | | | Date | Mon, 15 Apr 2002 18:44:04 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH] IDE TCQ #4 |
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On Mon, Apr 15 2002, Jens Axboe wrote: > On Mon, Apr 15 2002, Aaron Tiensivu wrote: > > Simple question but hopefully it has a simple answer.. is there a command > > you can issue or flag you can look for from the output of hdparm to tell if > > your hard drive is capable of TCQ before installing the patch? I have a few > > IBM drives that I'm sure have TCQ abilities but I don't trust them as far as > > I can throw them (being Hungarian and cursed) but I'd like to give TCQ a > > whirl on my WD 120GB drives that should work OK, if they support TCQ.. > > > > Sorry if it's already been asked.. :) > > It has not been asked :-) > > You can run a IDENTIFY_DEVICE from user space with the task ioctls and > look at word 83 -- bit 1 and 14 must be set for TCQ to be supported. If > you give me the model identifier from the IBM drive, I can tell you if > it has tcq or not... > > I'll write a small util to detect this tomorrow and send it to you + the > list.
Duh, you can of course just look at /proc/ide/ideX/hdY/identify and parse that. The info above is still valid for that, of course :-)
-- Jens Axboe
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