Linus Torvalds wrote:
On Fri, 3 Mar 2006, Jeff Garzik wrote:
256 max sectors IDE driver, 200 max sectors libata (due to driver not
hardware).
When I said "lower due to broken hw" I was more thinking about things like
the SiIimage driver, which actually limits the rqsize to 15 sectors due to
some strange hw interactions with seagate SATA devices.
Yep. There's trouble if the last FIS (sata packet, max 8K) is exactly 7.5K.
(It will then raise it back up to 128 if it's not a Seagate SATA drive. I
forget what the exact issue was. Some strange corruption in some limited
case, and not allowing big requests worked around it. There's some
strange IDE quirks out there...).
Technically its
if (sectors % 15 == 1)
explode
:) Yes, IDE is a weird weird world...
Jeff
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