Good day,
I'm having trouble getting my HP cd-writer cd4e series to work.
I'm new to linux. If this I'm sending this email to the wrong place
please let me know.
This device is an external usb cd-writer. I am using Ubuntu 5.10 with
2.6.12-10 kernel.
When I plug it in, /dev/sda gets created but I get some error msgs from
dmesg.
[4304160.827000] SCSI device sda: 4294967295 512-byte hdwr sectors
(2199023 MB)
[4304160.828000] sda: test WP failed, assume Write Enabled
[4304160.828000] sda: assuming drive cache: write through
[4304160.828000] /dev/scsi/host1/bus0/target0/lun0:<4>printk: 110
messages suppressed.
[4304160.828000] Buffer I/O error on device sda, logical block 0
[4304160.829000] unable to read partition table
[4304162.851000] sda: Unit Not Ready, sense:
[4304162.851000] : Current: sense key: Illegal Request
[4304162.851000] Additional sense: Invalid command operation code
[4304162.851000] Info fld=0x0
I tried to mount it anyways.
$ sudo mount -t auto /dev/sda /media/usb-cdrom
mount: you must specify the filesystem type
I put the cd in my other drive to figure out the fs.
$ mount -l
...
/dev/hdc on /media/cdrom0 type iso9660 (ro,noexec,nosuid,nodev,user=myuser)
...
I try to mount again now with iso9660 as fs.
$ sudo mount -t iso9660 /dev/sda /media/usb-cdrom
mount: wrong fs type, bad option, bad superblock on /dev/sda,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
I follow the instruction and look at dmesg:
$ dmesg | tail
[4304575.289000] sda: test WP failed, assume Write Enabled
[4304575.289000] sda: assuming drive cache: write through
[4304575.289000] /dev/scsi/host1/bus0/target0/lun0: unable to read
partition table
[4304577.321000] sda: Unit Not Ready, sense:
[4304577.321000] : Current: sense key: Illegal Request
[4304577.321000] Additional sense: Invalid command operation code
[4304577.321000] Info fld=0x0
[4304577.465000] SCSI device sda: 4294967295 512-byte hdwr sectors
(2199023 MB)
[4304577.469000] sda: test WP failed, assume Write Enabled
[4304577.469000] sda: assuming drive cache: write through
Looks the same as the first msgs I got.
I turned to the web and found out that the device has to be in
unusual_devs.h. So I checked and found that it is.
From unusual_devs.h:
#ifdef CONFIG_USB_STORAGE_USBAT
...
UNUSUAL_DEV( 0x03f0, 0x0307, 0x0001, 0x0001,
"HP",
"CD-Writer+ CD-4e",
US_SC_8070, US_PR_USBAT, init_usbat_cd, 0),
#endif
And from /proc/bus/usb/devices:
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
P: Vendor=03f0 ProdID=0307 Rev= 0.01
S: Product=HP USB CD-Writer Plus
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=ff Driver=usb-storage
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=5ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
So everything looks good.
Next I was curious if my kernel had been compiled with
CONFIG_USB_STORAGE_USBAT defined.
I checked my /boot/config and found out that it was.
Does anybody have an idea as to how I can mount cds put in this drive?
Thanks in advance for your help,
Pierre
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