On 02/22/2011 11:48 PM, Robert Hancock wrote:
The CF adapter probably doesn't support the 80-wire cable detect
protocol properly so the kernel thinks there's only a 40-wire cable
connected to it. You can try libata.force=80c on the kernel command
line and see what that does.
It seemed to work. I got read speeds of ~55MB/s, which is ok because I
was writing what was being read to an SSD.
dmesg:
[ 1.651748] pata_jmicron 0000:05:00.0: PCI INT A -> GSI 19 (level,
low) -> IRQ 19
[ 1.651783] pata_jmicron 0000:05:00.0: setting latency timer to 64
[ 1.652212] scsi0 : pata_jmicron
[ 1.652813] scsi1 : pata_jmicron
[ 1.652855] ata1: PATA max UDMA/100 cmd 0x4020 ctl 0x4014 bmdma
0x4000 irq 19
[ 1.652857] ata2: PATA max UDMA/100 cmd 0x4018 ctl 0x4010 bmdma
0x4008 irq 19
[ 1.850716] ata1: FORCE: cable set to 80c
[ 1.850723] ata1.00: CFA: TRANSCEND, 20091215, max UDMA/133
[ 1.850726] ata1.00: 125059072 sectors, multi 0: LBA
[ 1.870111] usb 1-6: new high speed USB device using ehci_hcd and
address 3
[ 1.890684] ata1.00: configured for UDMA/100
[ 1.890845] scsi 0:0:0:0: Direct-Access ATA TRANSCEND
2009 PQ: 0 ANSI: 5
[ 1.891008] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 1.891020] sd 0:0:0:0: [sda] 125059072 512-byte logical blocks:
(64.0 GB/59.6 GiB)
[ 1.891070] sd 0:0:0:0: [sda] Write Protect is off
[ 1.891073] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 1.891099] sd 0:0:0:0: [sda] Write cache: disabled, read cache:
enabled, doesn't support DPO or FUA
[ 1.892022] sda: sda1
[ 1.892395] sd 0:0:0:0: [sda] Attached SCSI disk
What next? Can the CF reader be whitelisted by libata?
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