URGENT for 5.4-R: ATA meister, read this now - 64/32 bits errorfound
- Trouble with ataraid
João Carlos Mendes Luís
jonny at jonny.eng.br
Thu Apr 28 14:00:00 PDT 2005
I think I may have found the problem!!!
Looking at the source code for arstrategy, we can find this:
arstrategy(struct bio *bp)
struct ar_softc *rdp = bp->bio_disk->d_drv1;
int blkno, count, chunk, lba, lbs, tmplba;
int drv = 0, change = 0;
That is, lba is an int, 32 bits!
Right below, this variable is used into a bio_pblkno, which is defined
at <sys/bio.h> as (daddrt_t):
buf1->bp.bio_pblkno = lba;
if ((buf1->drive = drv) > 0)
buf1->bp.bio_pblkno += rdp->offset;
But note that at the /sys/dev/ata/ata-all.h file, the
ata_request.u.ata.lba is defined as (u_int64_t). Also, at
<sys/types.h>, (daddr_t) is defined as (__int64_t). These are the data
types used at ata-disk.c
BTW: While searching for this bug, I found that a type (u_daddr_t) is
defined at <sys/blist.h> as (u_int32_t). I did not care for it right
now, but maybe this should be checked also.
Hope I am wrong, but if not, this may be the bug I´ve been chasing since
To probe further: Should the ata-raid driver be allowed to write the
disk at will? I did not even try to mount any partition, but it did
overwrote my data. Maybe to update the raid information. I'm not sure,
I did not search for this yet.
João Carlos Mendes Luís wrote:
> Followup to my message with more news.
> It is not a problem with mount_ntfs. Indeed, it seems to be a problem
> with the ataraid code.
> Today I booted from 5.3RC4 install CD, and mounted NO partition on the
> problem disk. But this was enough to corrupt the partition again.
> How can I know if the ATA RAID code is LBA48 compatible? The chipset is
> a Promise 20378, which is supported, in theory.
> João Carlos Mendes Luís wrote:
>> I've just bought a Seagate 250G SATA drive to run in a shared
>>desktop at home. It should have 3 boot partitions: 16M FreeBSD 5, 16M
>>linux, 32M NTFS for Windows XP. The remaining wil be formatted with
>>FAT32 to be used as a common data for the 3 operating systems.
>> Well, everything seemed to be fine. I copied the FreeBSD partition
>>from the previous installed disk with dump(8), and installed XP from
>>CDs. But suddenly, the data and NTFS partitions began to disappear. I
>>don't know exactly what were the steps used to crash the disk, but it
>>happened at least 3 times, after 3 full windows installs (which are not
>>quick, for my sadness). In the last one I could almost detect it.
>> I finished the initial windows instalation, and booted into FreeBSD
>>to make sure the NTFS and FAT partitions were available. They seemed to
>>be. Then I reboot into windows, and it crashed, with a missing HAL.DLL.
>> Boot again into FreeBSD, and the NTFS partition still seemed ok. But I
>>gone into the \WINDOWS\system32, and did an ls. The kernel pushed some
>>errors with "bad magic" or something like that, and the file system
>>locked. Also, the boot information for the first FAT32 partition has
>>been completely destroyed, leaving it unreadable.
>> The mainboard is an ASUS K8V, with 1G RAM. I'm running the 32 bit
>>version of FreeBSD, although it is an AMD64 machine. The 250G SATA disk
>>is on the promise RAID, and I have another PATA 120G on the promise
>>RAID, and a 40G PATA on standard IDE.
>> I already had a problem with a previous ASUS board in which the
>>promise raid could not deal with disks bigger than 120G. The symptons
>>were very similar. Could this be the problem? Does somebody know if
>>FreeBSD or mount_ntfs has any kind of disk size limitation in this hardware?
>> Oh, I did remember now that I was using mount_ntfs -o noatime, if
>> Thanks for any help,
>>PS: Now it has been fully reformatted with no NTFS, using FAT32 instead.
>> But I'm afraid of getting into FreeBSD again in this machine. Please
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