SDHC Sony SF-8UX, advertised as 94MB/s max read speed, don’t works.

I’m trying to use this SDHC as a ZFS cache on a Samsung laptop:

da0 at umass-sim0 bus 0 scbus3 target 0 lun 0

da0: <Multiple Card  Reader 1.00> Removable Direct Access SCSI-0 device

da0: Serial Number 058F63666438

da0: 40.000MB/s transfers

da0: 7667MB (15702016 512 byte sectors: 255H 63S/T 977C)

da0: quirks=0x2<NO_6_BYTE>

After some minutes of usage this error is displayed :

(da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 0a 97 9f 00 00 05 00

(da0:umass-sim0:0:0:0): CAM status: SCSI Status Error

(da0:umass-sim0:0:0:0): SCSI status: Check Condition

(da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to
ready change, medium may have changed)

(da0:umass-sim0:0:0:0): Command Specific Info: 0xaa5501

(da0:umass-sim0:0:0:0): Retrying command (per sense data)

(da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 0a 97 9f 00 00 05 00

(da0:umass-sim0:0:0:0): CAM status: SCSI Status Error

(da0:umass-sim0:0:0:0): SCSI status: Check Condition

(da0:umass-sim0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)

(da0:umass-sim0:0:0:0): Command Specific Info: 0xaa5501

(da0:umass-sim0:0:0:0): Error 6, Unretryable error

(da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 00 00 01 00 00 01 00

(da0:umass-sim0:0:0:0): CAM status: SCSI Status Error

(da0:umass-sim0:0:0:0): SCSI status: Check Condition

(da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to
ready change, medium may have changed)

(da0:umass-sim0:0:0:0): Command Specific Info: 0xaa5501

(da0:umass-sim0:0:0:0): Retrying command (per sense data)

(da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 00 00 01 00 00 01 00

(da0:umass-sim0:0:0:0): CAM status: SCSI Status Error

(da0:umass-sim0:0:0:0): SCSI status: Check Condition

(da0:umass-sim0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)

(da0:umass-sim0:0:0:0): Command Specific Info: 0xaa5501

(da0:umass-sim0:0:0:0): Error 6, Unretryable error

GEOM: da0: corrupt or invalid GPT detected.

GEOM: da0: GPT rejected -- may not be recoverable.

Trying to use the SDHC as a MS-DOS device I have receive the error:

(da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 4a 00 00 00 00 80 00

(da0:umass-sim0:0:0:0): CAM status: SCSI Status Error

(da0:umass-sim0:0:0:0): SCSI status: Check Condition

(da0:umass-sim0:0:0:0): SCSI sense: UNIT ATTENTION asc:28,0 (Not ready to
ready change, medium may have changed)

(da0:umass-sim0:0:0:0): Command Specific Info: 0xaa5501

(da0:umass-sim0:0:0:0): Retrying command (per sense data)

(da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 4a 00 00 00 00 80 00

(da0:umass-sim0:0:0:0): CAM status: SCSI Status Error

(da0:umass-sim0:0:0:0): SCSI status: Check Condition

(da0:umass-sim0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)

(da0:umass-sim0:0:0:0): Command Specific Info: 0xaa5501

(da0:umass-sim0:0:0:0): Error 6, Unretryable error

I’m using:

[root_at_ativ ~/bin]# uname -a

FreeBSD ativ.local 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r260700: Thu Jan 16
07:03:04 CET 2014     root_at_ativ.local:/usr/obj/usr/src/sys/NEWCONS  amd64

I’ve tested the card in Mac OS X on a Mac mini and in Windows 8 on the same
laptop, without problems. I’ve only noted that the I/O speed is  much lower
on the Mac mini.

Mac Write:

mac-mini:~ maurizio$ sudo dd if=/dev/zero  of=/dev/disk1 bs=1048576
count=200

209715200 bytes transferred in 138.019361 secs (1519462 bytes/sec)

Mac Read:

mac-mini:~ maurizio$ sudo dd of=/dev/null  if=/dev/disk1 bs=1048576
count=200

209715200 bytes transferred in 23.719487 secs (8841473 bytes/sec)

FreeBSD Write:

[root_at_ativ ~]# dd if=/dev/zero  of=/dev/da0 bs=1048576 count=200

209715200 bytes transferred in 13.647264 secs (15366831 bytes/sec)

FreeBSD Read:

[root_at_ativ ~]# dd of=/dev/null  if=/dev/da0 bs=1048576 count=200

209715200 bytes transferred in 11.050251 secs (18978320 bytes/sec)

Windows Write:

with DH_Speed 1 min. test 16M/sec

Windows Read:

with DH_Speed 1 min. test 17.4M/sec

Regards,
Maurizio