On 8/29/21 12:53 PM, Paul Lacatus wrote:
Salut la toata lumea,
Salut!
Am un raspberry pi care joaca rol de unifi controller pe reteaua de acasa, Reteaua e relativ stufoasa. Respectivul Raspi
nu mai buta . Cum backup la unifi controller nu am prea proaspat incerc sa citesc date de pe cardul SD . Pus pe un
cititor extern pe USB3 dmesg declara
usb-storage 2-2:1.0: USB Mass Storage device detected
[ 768.174710] scsi host0: usb-storage 2-2:1.0
[ 769.197925] scsi 0:0:0:0: Direct-Access SanDisk SDDR-389 HI02 PQ: 0
ANSI: 6
[ 769.198336] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 769.700295] sd 0:0:0:0: [sda] 31422464 512-byte logical blocks: (16.1
GB/15.0 GiB)
[ 769.701126] sd 0:0:0:0: [sda] Write Protect is on
[ 769.701139] sd 0:0:0:0: [sda] Mode Sense: 21 00 80 00
[ 769.701981] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled,
doesn't support DPO or FUA
[ 769.787605] sda: sda1 sda2
[ 769.791875] sd 0:0:0:0: [sda] Attached SCSI removable disk
[ 770.590988] EXT4-fs (sda2): INFO: recovery required on readonly filesystem
[ 770.591001] EXT4-fs (sda2): write access unavailable, cannot proceed (try
mounting with noload)
e2fsck in readonly pe partitia de interes
root@pi400:~# e2fsck -n /dev/sda2
e2fsck 1.44.5 (15-Dec-2018)
Warning: skipping journal recovery because doing a read-only filesystem check.
/dev/sda2: clean, 530968/974848 files, 2774314/3896064 blocks
sistemul zice : Error mounting /dev/sda2 at /media/pi/9c7e2035-df9b-490b-977b-d60f2170889d: cannot mount /dev/sda2
read-only
cum fac sa citesc datele de pe partitie ?
ca regula generala la recuperat date faci asa:
1. faci o imagine cat mai completa a stocarii cu dd_rescue
are optiunea de multiple tries, lasa loc liber unde nu reuseste, poate sa reia
operatiunea de unde a ramas etc
2. faci backup la imaginea master
3. incerci montarea a diverse partitii din imagine (cu parted unit b aflii
ofsetul si faci mount cu offset-ul)
intr-un mod cat mai neintruziv : ro, noload etc vezi de ex
https://www.sans.org/blog/how-to-mount-dirty-ext4-file-systems/
alternativ si/sau poti incerca data carving (recunoasterea de fisiere si
extragerea lor) cu photorec
HTH,
Adrian
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