Re: Card Reader

chuck gelm
2005-04-07T22:14:30Z

smertz wrote:
> 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

mount /dev/sdc1 /mnt/thumb

HTH, Chuck

> 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