Messages in this thread | | | Date | Fri, 18 Jul 2003 10:58:10 +0200 | From | Andries Brouwer <> | Subject | Re: [PATCH] pdcraid and weird IDE geometry |
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On Thu, Jul 17, 2003 at 07:33:00PM -0700, Walt H wrote:
> OK. Just got home from work. I've tried booting and specifying geometry > via hdg=79780,16,63 hdg=noprobe etc... The geometry is accepted, > however, drive access fails when trying to read the disk. This geometry > is the geometry reported by hde (my old drive without screwy geometry). > The code in calc_pdcblock_offset to calculate the offset is unchanged > in my patch (except the date type conversion to float) and calls > get_info_ptr for geometry.
I don't understand. Did you introduce some float? Remove it immediately.
You just replace
lba = (ideinfo->capacity / (ideinfo->head*ideinfo->sect)); lba = lba * (ideinfo->head*ideinfo->sect); lba = lba - ideinfo->sect;
by
lba = ideinfo->capacity - 63;
Then everything works for you, I suppose. Subsequently we wait for other people with the same hardware and see how the 63 varies as a function of their setup. (Or maybe you can go into the BIOS and specify different translations yourself?)
(By the way, didnt your boot parameters lead to ideinfo->head = 16 and ideinfo->sect = 63?)
Andries
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