TS-7553-V2 MicroSD Backup

From embeddedTS Manuals
Revision as of 15:57, 16 December 2015 by Kris (talk | contribs) (Initial creation)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
MicroSD.png Click to download the latest 4GB SD card image.

Using another Linux workstation

If you do not have an SD card that can boot to the initramfs, you can download the latest SD card image and rewrite this from a Linux workstation. A USB MicroSD adapter can be used to access the card. First, you must find out which /dev/ device corresponds with your USB reader/writer.

Step 1 Option 1 (lsblk)

Newer distributions include a utility called "lsblk" which allows simple identification of the intended card: 

lsblk

 NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
 sdY      8:0    0   400G  0 disk 
 ├─sdY1   8:1    0   398G  0 part /
 ├─sdY2   8:2    0     1K  0 part 
 └─sdY5   8:5    0     2G  0 part [SWAP]
 sr0     11:0    1  1024M  0 rom  
 sdX      8:32   1   3.9G  0 disk 
 ├─sdX1   8:33   1   7.9M  0 part 
 ├─sdX2   8:34   1     2M  0 part 
 ├─sdX3   8:35   1     2M  0 part 
 └─sdX4   8:36   1   3.8G  0 part

In this case the SD card is 4GB, so sdX is the target device. Note that on your system, sdX will not be a real device, it could be sda, sdb, mmcblk0, etc. Technologic Systems is not responsible for any damages cause by using the improper device node for imaging an SD card.

Step 1 Option 2 (dmesg)

After plugging in the device, you can use dmesg to list 

 scsi 54:0:0:0: Direct-Access     Generic  Storage Device   0.00 PQ: 0 ANSI: 2
 sd 54:0:0:0: Attached scsi generic sg2 type 0
 sd 54:0:0:0: [sdX] 3862528 512-byte logical blocks: (3.97 GB/3.84 GiB)

In this case, sdXc is shown as a 3.97GB card. Note that on your system, sdX will not be a real device, it could be sda, sdb, mmcblk0, etc. Technologic Systems is not responsible for any damages cause by using the improper device node for imaging an SD card.

Step 2

Once you have the target /dev/ device you can use "dd" to backup/restore the card. To restore the board to stock, or rewrite to the latest SD image: 

wget ftp://ftp.embeddedarm.com/ts-arm-sbc/ts-7553-V2-linux/binaries/ts-images/ts7553-V2-latest.dd.bz2

# Specify your block device instead of /dev/sdX
# Note that this is a whole disk image, so use /dev/sdX instead of
# using /dev/sdX1
bzcat ts7553-V2-latest.dd.bz2 | dd conv=fsync bs=4M of=/dev/sdX

To take a backup of your entire SD card, you can switch the input file and the output file: 

# Specify your block device instead of /dev/sdX
dd if=/dev/sdX conv=fsync bs=4M | bzip2 > backup.dd.bz2
Retrieved from "http://docs.embeddedTS.com/index.php?title=TS-7553-V2_MicroSD_Backup&oldid=6750"