Re: Card Reader

smertz
2005-04-07T21:44:49Z

Ray Olszewski wrote:
> At 02:35 PM 4/7/2005 -0600, smertz wrote:
>
>> I have a new computer I installed Linux on Red Hat Enterprise Linux ES
>> release 4 (Nahant), it has one of those all-in-one card readers on it.
>> I have made mountpoints as root as follows for my thumb, Compact flash
>> and secure digital drive.
>>
>> mkdir /mnt/thumb
>> mkdir /mnt/cf
>> mkdir /mnt/sd
>>
>>
>> Now when I tried to mount the Thumb (USB) drive I got an error # mount
>> /dev/sda2 /mnt/thumb
>> mount: /dev/sda2 already mounted or /mnt/thumb busy.
>>
>>
>> So what have I done wrong? I'm thinking sda2 is wrong, but don't know
>> why?
>>
>> df -h shows the following
>>
>> [root localhost mnt]# df -h
>> Filesystem Size Used Avail Use% Mounted on
>> /dev/mapper/VolGroup00-LogVol00
>> 183G 2.9G 171G 2% /
>> /dev/sda1 99M 19M 76M 20% /boot
>> none 247M 0 247M 0% /dev/shm
>> [root localhost mnt]#
>
>
> You don't tell us anything about your hardware, so any responses really
> are largely guesses. From the df output you show above, I'd infer that
> sda is a physical hard disk of some type.
>
> The card reader, then, is more likely sdb than sda, so I'd be trying
> sdb1 or sdb2 for the thumbdrive. Each possible device will have a
> different sdb* value, and figuring oout which is which is largely
> guesswork ... unless you're lucky enough to have a kernel with the sort
> of USB support for hotplugging that tells you where things connect to
> (in my experience, output to the console.
>
> See what "more /proc/scsi/scsi" tells you about what the kernel *thinks*
> is connected. Please include this info if you need to post a followup.
>
>
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This is the last few lines from dmesg. Based on this how would one
mount if I have made the mountpoint of /mnt/thumb

SCSI device sdc: 256000 512-byte hdwr sectors (131 MB)
sdc: Write Protect is off
sdc: Mode Sense: 02 00 00 00
sdc: assuming drive cache: write through
sdc: sdc1
Attached scsi removable disk sdc at scsi3, channel 0, id 0, lun 0
USB Mass Storage device found at 4

Red Hat Enterprise Linux ES release 4 (Nahant)

$ cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: ST3200822AS Rev: 3.02
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: eM Model: Bay Reader Rev: 1.00
Type: Direct-Access ANSI SCSI revision: 02

Thanks