From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 11328] kernel 2.6.26 reports massive filesystem errors on RAID5 device; on 2.6.24 it is working but not well
Date: Thu, 14 Aug 2008 01:37:35 -0700 (PDT)
Message-ID: <20080814083735.81901108035@picon.linux-foundation.org>
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http://bugzilla.kernel.org/show_bug.cgi?id=11328
bzolnier@gmail.com changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|io_ide@kernel-bugs.osdl.org |bzolnier@gmail.com
Status|NEW |ASSIGNED
------- Comment #4 from bzolnier@gmail.com 2008-08-14 01:37 -------
According to dmesg-2.6.24 all disks on HPT controller are using UDMA100 and
there are no error messages about dropping to PIO.
....
[ 43.835503] hde: Maxtor 7L300R0, ATA DISK drive
[ 43.835536] hde: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 43.837037] hde: UDMA/100 mode selected
[ 43.838590] ide2 at 0x7000-0x7007,0x6802 on irq 16
[ 43.838626] Probing IDE interface ide3...
[ 44.127439] hdh: Maxtor 5A300J0, ATA DISK drive
[ 44.463041] hdg: Maxtor 5A300J0, ATA DISK drive
[ 44.463062] hdg: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 44.463201] hdg: UDMA/100 mode selected
[ 44.463340] hdh: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 44.463472] hdh: UDMA/100 mode selected
[ 44.463638] ide3 at 0x6400-0x6407,0x6002 on irq 16
[ 44.463692] Probing IDE interface ide0...
[ 44.750830] hdb: Maxtor 5A300J0, ATA DISK drive
[ 45.086698] hda: Maxtor 5A300J0, ATA DISK drive
[ 45.086721] hda: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 45.086858] hda: UDMA/100 mode selected
[ 45.086997] hdb: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 45.087126] hdb: UDMA/100 mode selected
[ 45.087295] ide0 at 0x8800-0x8807,0x8402 on irq 16
[ 45.087351] Probing IDE interface ide1...
[ 45.374370] hdd: Maxtor 5A300J0, ATA DISK drive
[ 45.710125] hdc: Maxtor 5A300J0, ATA DISK drive
[ 45.710147] hdc: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 45.710293] hdc: UDMA/100 mode selected
[ 45.710432] hdd: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 45.710564] hdd: UDMA/100 mode selected
[ 45.710728] ide1 at 0x8000-0x8007,0x7802 on irq 16
...
[ You can verify if DMA is really used by checking DMA enable setting with
'hdparm -d /dev/device' and device speed with 'hdparm -Ttf /dev/device'. ]
HPT support in libata (SCSI emulation) is known to be experimental so I advise
to use IDE subsystem. I'll re-assign the bug to the right people anyway.
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