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datarecovery [2016/08/16 21:13]
niziak created 		datarecovery [2023/01/28 18:51] (current)
niziak
Line 1: Line 1:
-====== ​safecopy ​====== +====== ​Data recovery ​======
-There are some predefined settings: +
-  * stage1: Preset to rescue most of the data fast,  using  no  retries ​ and avoiding bad areas. +
-  * stage2: Preset to rescue more data, using no retries but  searching ​ for exact ends of bad areas. +
-  * stage3: Preset to rescue everything that can be  rescued ​ using  maximum retries, head realignment tricks and low level access.+
  
-In current working directory, safecopy will create files with badblocks map: stage#​.badblocks,​ which are used in next stages. 
-Typical usage is: 
 <code bash> <code bash>
-safecopy ​--stage1 ​/dev/source output.img +hdparm ​-c0 /dev/sdi 
-safecopy ​--stage2 ​/dev/source output.img +hdparm ​-X1 /dev/sdi 
-safecopy ​--stage3 ​/dev/source output.img+hdparm ​-d0 /dev/sdi 
 +echo 1 > /​sys/​block/​sdi/​device/​queue_depth
 </​code>​ </​code>​
  
-===== on usb drives ​===== +===== fast erase whole disc ===== 
-Not all USB adapters can handle SATA low level operations.+
 <code bash> <code bash>
-safecopy ​--forceopen ​-L 0 --stage1 ​/dev/source ​/dev/destination+sudo hdparm ​--user-master u --security-set-pass ABC /dev/sdX 
 +sudo hdparm --user-master u --security-erase ABC /dev/sdX 
 + 
 +# check if device security is "not enabled"​ 
 +hdparm -I /dev/sdX
 </​code>​ </​code>​
 +
 +
 +====== sata hotplug ​ ======
 +===== Plug =====
 +
 +<code bash>
 +echo 0 - 0 > /​sys/​class/​scsi_host/​host5/​scan
 +</​code>​
 +
 +Rescan all ports:
 +<​code>​
 +exec tee /​sys/​class/​scsi_host/​host*/​scan <<<'​- - -' >/​dev/​null
 +</​code>​
 +===== Unplug =====
 +
 +<code bash>​echo 1 > /​sys/​block/​(whatever)/​device/​delete</​code>​
 +
 +