MobileRead Forums - View Single Post - Aura H2O how to switch the external sd card to a bigger one without losing reading progress?

frostschutz · 09-02-2016, 07:36 AM

Oh wow. I didn't know about the external id...

SELECT ExternalId from content; -> 3E1E1C89

file -s /dev/sdj1 -> /dev/sdj1: DOS/MBR boot sector, code offset 0x58+2, OEM-ID "mkfs.fat", sectors/cluster 8, Media descriptor 0xf8, sectors/track 62, heads 61, hidden sectors 2048, sectors 3858432 (volumes > 32 MB) , FAT (32 bit), sectors/FAT 3768, serial number 0x3e1e1c89, unlabeled

It's the serial number of the FAT filesystem, so raw 1:1 copy should work. Or a formatter that lets you pick this number directly. Or using a hexeditor to change it. Or just updating the database itself.

09-02-2016, 07:36 AM	#4
frostschutz Linux User Posts: 2,282 Karma: 6123806 Join Date: Sep 2010 Location: Heidelberg, Germany Device: none	Oh wow. I didn't know about the external id... SELECT ExternalId from content; -> 3E1E1C89 file -s /dev/sdj1 -> /dev/sdj1: DOS/MBR boot sector, code offset 0x58+2, OEM-ID "mkfs.fat", sectors/cluster 8, Media descriptor 0xf8, sectors/track 62, heads 61, hidden sectors 2048, sectors 3858432 (volumes > 32 MB) , FAT (32 bit), sectors/FAT 3768, serial number 0x3e1e1c89, unlabeled It's the serial number of the FAT filesystem, so raw 1:1 copy should work. Or a formatter that lets you pick this number directly. Or using a hexeditor to change it. Or just updating the database itself. Last edited by frostschutz; 09-02-2016 at 07:38 AM.