hello,
I have a samsung hdd sp0411c 40GB on my pc.
You can see it here
http://www.amazon.co.uk/Samsung-SP0411C-40GB-SATA-Drive/dp/B000852FICThe hardware specification indicate udma/133.
The dmesg indicate udma/100 (see below).
Why?
Is there any reason why the hdd is not recognized to udma/133?
How to change it to udma/133?
The port where the HDD is attached seems to be a 133 port.
[ 0.545785] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x34e0 irq 14
[ 0.545790] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x34e8 irq 15
[ 0.545835] ata_piix 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19
[ 0.545844] ata_piix 0000:00:1f.2: MAP [ P0 P2 P1 P3 ]
[ 0.696717] ata_piix 0000:00:1f.2: setting latency timer to 64
[ 0.697154] scsi2 : ata_piix
[ 0.703348] scsi3 : ata_piix
[ 0.703525] ata3: SATA max UDMA/133 cmd 0x3818 ctl 0x3830 bmdma 0x34f0 irq 19[ 0.703530] ata4: SATA max UDMA/133 cmd 0x3820 ctl 0x3834 bmdma 0x34f8 irq 19
[ 0.703777] sata_via 0000:05:09.0: version 2.6
[ 0.703796] sata_via 0000:05:09.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[ 0.703847] sata_via 0000:05:09.0: routed to hard irq line 10
[ 0.704383] scsi4 : sata_via
[ 0.704481] scsi5 : sata_via
[ 0.704575] scsi6 : sata_via
[ 0.704648] ata5: SATA max UDMA/133 port i16@0x1420 bmdma 0x1400 irq 18
[ 0.704654] ata6: SATA max UDMA/133 port i16@0x1430 bmdma 0x1408 irq 18
[ 0.704658] ata7: PATA max UDMA/133 port i16@0x1440 bmdma 0x1410 irq 18
[ 0.705815] Fixed MDIO Bus: probed
[ 0.705825] PPP generic driver version 2.4.2
[ 0.705891] PPP Deflate Compression module registered
[ 0.705896] NET: Registered protocol family 24
...
[ 0.760248] ata1.00: configured for MWDMA2
[ 0.761983] scsi 0:0:0:0: CD-ROM COMPAQ CD-ROM CRN-8245B 1.16 PQ: 0 ANSI: 5
[ 0.764386] sr0: scsi3-mmc drive: 24x/24x cd/rw xa/form2 cdda tray
[ 0.764391] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 0.764501] sr 0:0:0:0: Attached scsi CD-ROM sr0
[ 0.764571] sr 0:0:0:0: Attached scsi generic sg0 type 5
[ 0.871095] ata3.00: ATA-7: SAMSUNG SP0411C, UU100-05,
max UDMA/100[ 0.871100] ata3.00: 78165360 sectors, multi 16: LBA48
[ 0.876821] ata3.00: configured for UDMA/100
[ 0.876960] scsi 2:0:0:0: Direct-Access ATA SAMSUNG SP0411C UU10 PQ: 0 ANSI: 5
[ 0.877138] sd 2:0:0:0: [sda] 78165360 512-byte logical blocks: (40.0 GB/37.2 GiB)
[ 0.877189] sd 2:0:0:0: Attached scsi generic sg1 type 0
[ 0.877249] sd 2:0:0:0: [sda] Write Protect is off
[ 0.877262] sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 0.877317] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 0.880607] sda: sda1
...