what's the status of SATA support in 2.4.x kernels?
it seems like the first kernel that supports SATA is 2.4.21-ac4. I
found few messages on lkml but not much more info about status of
development.
I am specifically interested whether it should support disks above
137GB (as I have problems accessing anything above 137GB on 250GB SATA
drive)
any info/answers/pointers to docs?
(I already posted a message here about 137GB & SATA but got no
answers so I am trying somewhat different question)
TIA
erik
On Fri, Jul 25, 2003 at 11:50:16AM -0700, Erik Steffl wrote:
> I am specifically interested whether it should support disks above
> 137GB (as I have problems accessing anything above 137GB on 250GB SATA
> drive)
It should.
I will be testing this when I return from OLS, next week.
Jeff
Jeff Garzik wrote:
> On Fri, Jul 25, 2003 at 11:50:16AM -0700, Erik Steffl wrote:
>
>> I am specifically interested whether it should support disks above
>>137GB (as I have problems accessing anything above 137GB on 250GB SATA
>>drive)
>
>
> It should.
>
> I will be testing this when I return from OLS, next week.
any news?
I have found that /var/log/kern.log has following messages (when
trying to access blocks above 137GB, using e.g. badblocks):
Jul 29 00:41:02 jojda kernel: Attached scsi disk sda at scsi0, channel
0, id 0, lun 0
Jul 29 00:41:02 jojda kernel: SCSI device sda: 490234752 512-byte hdwr
sectors (251000 MB)
Jul 29 00:41:03 jojda kernel: sda: sda1
Jul 29 00:47:41 jojda kernel: I/O error: dev 08:00, sector 268435456
Jul 29 00:47:41 jojda kernel: I/O error: dev 08:00, sector 268435456
Jul 29 00:47:41 jojda kernel: I/O error: dev 08:00, sector 268435472
Jul 29 00:47:41 jojda kernel: I/O error: dev 08:00, sector 268435456
Jul 29 00:47:41 jojda kernel: I/O error: dev 08:00, sector 268435456
Jul 29 00:47:41 jojda kernel: I/O error: dev 08:00, sector 268435464
Jul 29 00:47:41 jojda last message repeated 3 times
I have found where these are coming from (drivers/scsi/scsi_lib.c)
but it's in fairly generic error routine that is called from number of
places so it doesn't explain anything to me... (I'll take a look at it
again but considering that I have almost zero experience with kernel
programming it probably will not be very useful)
this is using linux-2.4.21-ac4 kernel (scsi sata, as above messages show)
erik
Erik Steffl wrote:
> Jeff Garzik wrote:
>
>> On Fri, Jul 25, 2003 at 11:50:16AM -0700, Erik Steffl wrote:
>>
>>> I am specifically interested whether it should support disks above
>>> 137GB (as I have problems accessing anything above 137GB on 250GB
>>> SATA drive)
>>
>>
>>
>> It should.
>>
>> I will be testing this when I return from OLS, next week.
just in case anybody's searching the archives:
I got the following advice from Jeff Garzik and it worked (didn't do
much testing yet, but at least the whole disk is usable):
2.4.21-ac4 (vanilla plus ac4 patches)
create another vanilla tree with libata5 patches, then copy the
following files to ac4 tree: drivers/scsi/{ata_piix,libata}.c and
include/linux/ata.h
build with scsi ata support (make sure you have bios set so that sata
drives are seen as sata drives, not legacy ide drives, I only got
machines lockups in legacy mode). The disks should be visible as scis
disk (/dev/sd[a-z]).
libata5 patch:
ftp://ftp.kernel.org/pub/linux/kernel/people/jgarzik/patchkits/2.4/2.4.21-libata5.patch.bz2
erik