Hi all,
When I run hdparm -I on a local device (CDROM) I get...
/dev/sr0:
ATAPI CD-ROM, with removable media
Model Number: TSSTcorp BDDVDW SN-506BB
Serial Number: R90H6YLG7000QR
Firmware Revision: SB00
Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA
Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
Likely used CD-ROM ATAPI-1
Configuration:
DRQ response: 50us.
Packet size: 12 bytes
cache/buffer size = unknown
Capabilities:
LBA, IORDY(can be disabled)
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* PACKET command feature set
* Look-ahead
* DEVICE_RESET command
* NOP cmd
Removable Media Status Notification feature set
* Gen1 signaling speed (1.5Gb/s)
* Host-initiated interface power management
* Phy event counters
Device-initiated interface power management
Asynchronous notification (eg. media change)
* Software settings preservation
However when I run hdparm -I on the same device connected via open-iscsi, I
get...
/dev/sr1:
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ATA device, with non-removable media
Standards:
Likely used: 1
Configuration:
Logical max current
cylinders 0 0
heads 0 0
sectors/track 0 0
--
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 0 MBytes
device size with M = 1000*1000: 0 MBytes
cache/buffer size = unknown
Capabilities:
IORDY not likely
Cannot perform double-word IO
R/W multiple sector transfer: not supported
DMA: not supported
PIO: pio0
I have tried with open-iscsi initiator and both scst-iscsi (latest svn
version) and tgt (from repository) with the same results. It is probably
the same problem that is causing the CDROM to be detected as scsi1 and not
as scsi3-mmc and prevents MMC/AACS playback via bluray since the kernel
detects CDROM capabilities in a similar way.
Is this a problem in open-iscsi (initiator), the target drivers (scst-iscsi
/ tgt) or something connected (e.g. incomplete emulation of MMC command
set)? How can I fix this?
Best,
Alex
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