Mark Lord wrote:
Malcolm Gillies wrote:
2) the HD runs error-free at UDMA/33 when I use a different, PIO-only
CF card but otherwise the same cabling, adaptor etc.
It would be useful to see the boot log for this scenario.
In particular, I'm curious what timings get chosen for the two devices.
But since that CF card cannot do DMA, it should not respond at all to
any HD DMA cycles, even if the timing is too fast for it's decoders to
work properly.
scsi0 : ata_piix
scsi1 : ata_piix
ata1: PATA max UDMA/100 cmd 0x000101f0 ctl 0x000103f6 bmdma 0x0001ffa0
irq 14
ata2: PATA max UDMA/100 cmd 0x00010170 ctl 0x00010376 bmdma 0x0001ffa8
irq 15
ata1.00: CFA: Renesas XX.V.3.5.0.0, Rev 0.00, max PIO4
ata1.00: 1000944 sectors, multi 1: LBA
ata1.01: ATA-7: SAMSUNG HD400LD, WQ100-14, max UDMA/100
ata1.01: 781422768 sectors, multi 0: LBA48
ata1.00: configured for PIO4
ata1.01: configured for UDMA/100
ata2.00: ATAPI: LG CD-ROM CRN-8245B, 1.18, max UDMA/33
ata2.00: configured for UDMA/33
scsi 0:0:0:0: Direct-Access ATA Renesas XX.V.3.5 Rev PQ: 0 ANSI: 5
scsi 0:0:1:0: Direct-Access ATA SAMSUNG HD400LD WQ10 PQ: 0 ANSI: 5
scsi 1:0:0:0: CD-ROM LG CD-ROM CRN-8245B 1.18 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 1000944 512-byte hardware sectors (512 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't
support DPO or FUA
sd 0:0:0:0: [sda] 1000944 512-byte hardware sectors (512 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't
support DPO or FUA
sda: sda1
sd 0:0:0:0: [sda] Attached SCSI removable disk
sd 0:0:1:0: [sdb] 781422768 512-byte hardware sectors (400088 MB)
sd 0:0:1:0: [sdb] Write Protect is off
sd 0:0:1:0: [sdb] Mode Sense: 00 3a 00 00
sd 0:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
sd 0:0:1:0: [sdb] 781422768 512-byte hardware sectors (400088 MB)
sd 0:0:1:0: [sdb] Write Protect is off
d 0:0:1:0: [sdb] Mode Sense: 00 3a 00 00
sd 0:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
sdb: sdb1
sd 0:0:1:0: [sdb] Attached SCSI disk
# hdparm -I /dev/sda
/dev/sda:
CompactFlash ATA device, with removable media
Model Number: Renesas XX.V.3.5.0.0
Serial Number: X0819 20050726050808
Firmware Revision: Rev 0.00
Standards:
Likely used: 4
Configuration:
Logical max current
cylinders 993 993
heads 16 16
sectors/track 63 63
--
bytes/track: 0 bytes/sector: 512
CHS current addressable sectors: 1000944
LBA user addressable sectors: 1000944
device size with M = 1024*1024: 488 MBytes
device size with M = 1000*1000: 512 MBytes
Capabilities:
LBA, IORDY(may be)(cannot be disabled)
Buffer size: 1.0kB bytes avail on r/w long: 4
Standby timer values: spec'd by Vendor
R/W multiple sector transfer: Max = 1 Current = 1
DMA: not supported
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* CFA feature set
# hdparm --direct -Tt /dev/sdb
/dev/sdb:
Timing O_DIRECT cached reads: 180 MB in 2.02 seconds = 89.04 MB/sec
Timing O_DIRECT disk reads: 224 MB in 3.03 seconds = 74.04 MB/sec
# hdparm --direct -Tt /dev/sda
/dev/sda:
Timing O_DIRECT cached reads: 6 MB in 2.27 seconds = 2.64 MB/sec
Timing O_DIRECT disk reads: 8 MB in 3.03 seconds = 2.64 MB/sec
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