mt: /dev/st0: No such device or address

J. Epperson linux-poweredge at epperson.homelinux.net
Thu Jun 21 07:47:23 CDT 2007


On Thu, June 21, 2007 05:49, Konstantin Kostyuchenko wrote:
>
>   Server        :DELL PowerEdge 2950
>   TapeDrive     :PowerVault 110T LTO3
>
> After booting, try 'mt -f /dev/st0 status' and got this message :
> mt: /dev/st0: No such device or address
>
> The LTO3 drive worked on this server several weeks ago and I'm
> successfully wrote data on tape.
>
> # dmesg
> (scsi2:A:6): 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit)
>   Vendor: IBM       Model: ULTRIUM-TD3       Rev: 5BG2
>   Type:   Sequential-Access                  ANSI SCSI revision: 03
>
> Attached scsi tape st0 at scsi2, channel 0, id 6, lun 0
> Attached scsi generic sg0 at scsi0, channel 0, id 8, lun 0,  type 13
> Attached scsi generic sg1 at scsi0, channel 2, id 0, lun 0,  type 0
> Attached scsi generic sg2 at scsi2, channel 0, id 6, lun 0,  type 1
>
> # lsmod|grep scsi
> scsi_mod              151808  7
> IBMtape,sg,st,sr_mod,aic7xxx,megaraid_sas,sd_mod
>
>
> # lsscsi
> [0:0:8:0]    enclosu DP       BACKPLANE        1.00  -
> [0:2:0:0]    disk    DELL     PERC 5/i         1.00  /dev/sda
> [2:0:6:0]    tape    IBM      ULTRIUM-TD3      5BG2  -
>
> no devices.
>
> # mt -f /dev/st0 status
> mt: /dev/st0: No such device or address
>
> # cat /proc/scsi/scsi
> Attached devices:
> Host: scsi0 Channel: 00 Id: 08 Lun: 00
>   Vendor: DP       Model: BACKPLANE        Rev: 1.00
>   Type:   Enclosure                        ANSI SCSI revision: 05
> Host: scsi0 Channel: 02 Id: 00 Lun: 00
>   Vendor: DELL     Model: PERC 5/i         Rev: 1.00
>   Type:   Direct-Access                    ANSI SCSI revision: 05
> Host: scsi2 Channel: 00 Id: 06 Lun: 00
>   Vendor: IBM      Model: ULTRIUM-TD3      Rev: 5BG2
>   Type:   Sequential-Access                ANSI SCSI revision: 03
>

What does /dev/st0 look like?  Your lsmod implies that the st driver is
loaded, do you see it hooked to the tape drive when you do "dmesg|grep
^st"?  Like
st 0:0:6:0: Attached scsi tape st0



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