Hi
I have a Dell Precision M70 whose primary hard disk is a SATA disk
(/dev/sda) running FC4 (kernel 2.6.15-1.1831_FC4).
The secondary hard disk is a PATA one (/dev/hdc, in the laptop modular
bay) and apparently I cannot get DMA enabled on it, resulting in very poor
performances (2.5 MB/s against 25 MB/s for the same disk in the modular
bay of a PATA only Dell D800 where it runs happily with DMA enabled).
If I try to enable DMA by hand I get:
[root@pcalfr ~]# hdparm -d1 /dev/hdc
/dev/hdc:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
Every help/suggestion is greatly appreciated
Alfredo Ferrari
P.S. The only messages of some relevance I can see at boot (from dmesg)
are:
DMA zone: 4096 pages, LIFO batch:0
DMA32 zone: 0 pages, LIFO batch:0
Normal zone: 225280 pages, LIFO batch:31
HighMem zone: 294872 pages, LIFO batch:31
...
PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.2
...
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ide0: I/O resource 0x1F0-0x1F7 not free.
ide0: ports already in use, skipping probe
Probing IDE interface ide1...
hdc: ST94811A, ATA DISK drive
ide1 at 0x170-0x177,0x376 on irq 15
hdc: max request size: 1024KiB
hdc: 78140160 sectors (40007 MB) w/8192KiB Cache, CHS=16383/255/63
hdc: cache flushes supported
hdc: hdc1 hdc2 hdc3 < hdc5 hdc6 hdc7 hdc8 >
ide-floppy driver 0.99.newide
...
SCSI subsystem initialized
libata version 1.20 loaded.
ata_piix 0000:00:1f.2: version 1.05
ACPI: PCI Interrupt 0000:00:1f.2[B] -> Link [LNKB] -> GSI 5 (level, low) -> IRQ 5
ata: 0x170 IDE port busy
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: SATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xBFA0 irq 14
ata1: dev 0 cfg 49:0f00 82:746b 83:7fe9 84:4023 85:7469 86:3e49 87:4023 88:203f
ata1: dev 0 ATA-6, max UDMA/100, 195371568 sectors: LBA48
ata1(0): applying bridge limits
ata1: dev 0 configured for UDMA/100
scsi0 : ata_piix
Vendor: ATA Model: Hitachi HTS72101 Rev: MCZO
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sda: 195371568 512-byte hdwr sectors (100030 MB)
SCSI device sda: drive cache: write back
SCSI device sda: 195371568 512-byte hdwr sectors (100030 MB)
SCSI device sda: drive cache: write back
sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7<6>input: PS/2 Mouse as /class/input/input1
sda8 sda9 >
sd 0:0:0:0: Attached scsi disk sda
input: AlpsPS/2 ALPS GlidePoint as /class/input/input2
kjournald starting. Commit interval 600 seconds
+----------------------------------------------------------------------------+
| Alfredo Ferrari || Tel.: +41.22.767.6119 |
| C.E.R.N. || Fax.: +41.22.767.7555 |
| European Laboratory for Particle Physics|| |
| AB Division / ATB Group || e-mail: |
| 1211 Geneva 23 || Alfredo.Ferrari@xxxxxxx |
| Switzerland || Alfredo.Ferrari@xxxxxxxxxx |
+----------------------------------------------------------------------------+
