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Tuesday, May 3, 2016

mount_msdosfs: /dev/da1s1: No such file or directory when trying to mount a flash to juniper ex series switch

Summary: 

When trying to mount a flash disk to a juniper switch, i got this error "mount_msdosfs: /dev/da1s1: No such file or directory"

Problem or Goal:

root@:RE:0% mkdir /var/tmp/usb
root@:RE:0% mount_msdosfs /dev/da1s1 /var/tmp/usb
mount_msdosfs: /dev/da1s1: No such file or directory

on the console, when i insert the flash drive, i observe these errors:

root@:RE:0% umass1: Alcor Micro Mass Storage Device, rev 2.00/0.01, addr 4
da1 at umass-sim1 bus 1 target 0 lun 0
da1: <Generic USB Flash Disk 7.76> Removable Direct Access SCSI-4 device 
da1: 40.000MB/s transfers
da1: Attempt to query device size failed: NOT READY, Medium not present
(da1:umass-sim1:1:0:0): READ CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0 
(da1:umass-sim1:1:0:0): CAM Status: SCSI Status Error
(da1:umass-sim1:1:0:0): SCSI Status: Check Condition
(da1:umass-sim1:1:0:0): NOT READY asc:3a,0
(da1:umass-sim1:1:0:0): Medium not present
(da1:umass-sim1:1:0:0): Unretryable error
Opened disk da1 -> 6
(da1:umass-sim1:1:0:0): READ CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0 
(da1:umass-sim1:1:0:0): CAM Status: SCSI Status Error
(da1:umass-sim1:1:0:0): SCSI Status: Check Condition
(da1:umass-sim1:1:0:0): NOT READY asc:3a,0
(da1:umass-sim1:1:0:0): Medium not present
(da1:umass-sim1:1:0:0): Unretryable error
Opened disk da1 -> 6

Cause:

Most probably, the flash disk is not well formatted.

Solution: 

I took out the flash drive from the switch and formatted it on a windows PC using file system FAT

Problem Solved?

Yes, after i inserted it back in the switch and i was able to mount it.

root@:RE:0% umass1: Generic Mass Storage, rev 2.00/1.06, addr 4
da1 at umass-sim1 bus 1 target 0 lun 0
da1: <Generic Flash Disk 8.07> Removable Direct Access SCSI-4 device 
da1: 40.000MB/s transfers
da1: 7800MB (15974400 512 byte sectors: 255H 63S/T 994C)

root@:RE:0% mount_msdosfs /dev/da1s1 /var/tmp/usb
root@:RE:0% ls -ltr /var/tmp/usb/
total 219776
-rwxr-xr-x  1 root  field  112517772 May  2  2016 jinstall-ex-4500-12.3R12.4-domestic-signed.tgz

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