Quoting Alan Cox (alan@lxorguk.ukuu.org.uk):
> On Gwe, 2003-07-18 at 23:34, Kresimir Kukulj wrote:
> > resync. That means that disks are busy (in PIO mode), and when hdparm -d1 -X69
> > executes, system freezes [if there is no disk/little activity hdparm cludge
> > passes ok - for example, if RAID-1 is clean so there is no resync].
>
> The newest driver should put them into DMA automatically and set the
> limit. The other changes I'll check over but certainly look like they
> may be needed.
Hm, I tried 2.4.22-pre7 and it did not set disks to DMA mode, but it did set
the limit (max_kb_per_request). With the following modification, kernel
(2.4.22-pre7) initializes both disk to UDMA133, and as far as I can see, it
works ok.
In siimage.c there is a check for Maxtor disks - they are/should be set to
UDMA100. Is this also necessary for Seagate SATA disks ?
--------------
--- siimage.c.orig Mon Jul 21 15:13:16 2003
+++ siimage.c Mon Jul 21 16:56:28 2003
@@ -488,7 +488,7 @@
struct hd_driveid *id = drive->id;
if ((id->capability & 1) != 0 && drive->autodma) {
- if (!(hwif->atapi_dma))
+ if ((hwif->atapi_dma))
goto fast_ata_pio;
/* Consult the list of known "bad" drives */
if (hwif->ide_dma_bad_drive(drive))
---------------
And it looks like:
SiI3112 Serial ATA: IDE controller at PCI slot 02:04.0
PCI: Found IRQ 5 for device 02:04.0
PCI: Sharing IRQ 5 with 02:00.0
SiI3112 Serial ATA: chipset revision 2
SiI3112 Serial ATA: not 100% native mode: will probe irqs later
ide2: MMIO-DMA , BIOS settings: hde:pio, hdf:pio
ide3: MMIO-DMA , BIOS settings: hdg:pio, hdh:pio
hda: SAMSUNG CD-ROM SC-152A, ATAPI CD/DVD-ROM drive
hde: ST3120023AS, ATA DISK drive
blk: queue c0326ef8, I/O limit 4095Mb (mask 0xffffffff)
hdg: ST3120023AS, ATA DISK drive
blk: queue c0327364, I/O limit 4095Mb (mask 0xffffffff)
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide2 at 0xf8800080-0xf8800087,0xf880008a on irq 5
ide3 at 0xf88000c0-0xf88000c7,0xf88000ca on irq 5
hde: attached ide-disk driver.
hde: host protected area => 1
hde: 234441648 sectors (120034 MB) w/8192KiB Cache, CHS=232581/16/63, UDMA(133)
hdg: attached ide-disk driver.
hdg: host protected area => 1
hdg: 234441648 sectors (120034 MB) w/8192KiB Cache, CHS=232581/16/63, UDMA(133)
/dev/hdg:
multcount = 16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 14593/255/63, sectors = 234441648, start = 0
busstate = 1 (on)
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 8192.0kB ECC bytes: 4 Queue depth: 1
Standby timer values: spec'd by standard
r/w multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 65278
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
[Mirror]
# hdparm -tT /dev/md3
/dev/md3:
Timing buffer-cache reads: 128 MB in 0.24 seconds =533.33 MB/sec
Timing buffered disk reads: 64 MB in 2.42 seconds = 26.45 MB/sec
[One plex]
# hdparm -tT /dev/hde3
/dev/hde3:
Timing buffer-cache reads: 128 MB in 0.24 seconds =533.33 MB/sec
Timing buffered disk reads: 64 MB in 1.82 seconds = 35.16 MB/sec
Poor results, but at least it works.
-- Kresimir Kukulj madmax@iskon.hr +--------------------------------------------------+ Old PC's never die. They just become Unix terminals. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:43 EST