However, this option might be best left for a second pass to avoid further stress a failing device. In addition, the –retry-passes ( -r) flag sets the number of retries on bad sectors. We use –idirect ( -d) to skip kernel caching. Pct rescued: 0.58%, read errors: 0, remaining time: 19mĬopying non-tried blocks. Rescued: 1597 MB, bad areas: 0, run time: 6s Non-tried: 273280 MB, bad-sector: 0 B, error rate: 0 B/s Opos: 1597 MB, non-scraped: 0 B, average rate: 228 MB/s Ipos: 1597 MB, non-trimmed: 0 B, current rate: 47972 kB/s Storage Rescueįor example, the GNU ddrescue (Disc Dump Rescue) tool can dump a raw image of the problematic medium, block by block: $ ddrescue -idirect -retry-passes=3 /dev/sda dump.img dump.logfile It might be lost (blank) or just faulty.Īfter analyzing the damage, let’s see what we can do to remedy any issues. We need to know whether the layout is still readable.
I/O size (minimum/optimal): 4096 bytes / 4096 bytesĭevice Boot Start End Sectors Size Id Type Sector size (logical/physical): 512 bytes / 4096 bytes
Recover files in linux Offline#
# 1 Short offline Completed without error 00% 6660 -Īfter checking the device status, we can also see the partition table via fdisk (Fixed Disk) and its –list ( -l) flag: $ fdisk -listĭisk /dev/sda: 101 GiB, 108587687936 bytes, 212085328 sectors Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error SMART Self-test log structure revision number 1 Smartctl 7.2 r5155 (local build)Ĭopyright (C) 2002-20, Bruce Allen, Christian Franke, = START OF READ SMART DATA SECTION = For example, there are the smartmontools (SMART Monitor Tools): $ smartctl -l selftest /dev/sda
(Self-Monitoring, Analysis, and Reporting Technology) in modern storage devices. It’s usually best to diagnose when not booting from the target.Īlternatively, we can use S.M.A.R.T. Note how we first unmount a partition before scanning. Here, we use the -v (verbose), -s (show progress), and -n (non-destructive read-write) flags. Testing with random pattern: 1.05% done, 4:34 elapsed. Indeed, they are usually the first evidence we have of storage damage: $ umount /dev/sdaĬhecking for bad blocks in non-destructive read-write modeĬhecking for bad blocks (non-destructive read-write test) In particular, the badblocks tool is handy for finding bad blocks on a device.
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