Changes between Version 65 and Version 66 of FAQ


Ignore:
Timestamp:
Mar 27, 2017, 12:07:44 PM (3 years ago)
Author:
Gabriele Pohl
Comment:

Point to new BadBlockHowto wiki page

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  • FAQ

    v65 v66  
    393393
    394394If the disk can read the sector of data a single time, and the damage is permanent, not transient, then the disk firmware will mark the sector as 'bad' and allocate a spare sector to replace it.  But if the disk can't read the sector even once, then it won't reallocate the sector, in hopes of being able, at some time in the future, to read the data from it.  '''A write to an unreadable (corrupted) sector will fix the problem.''' If the damage is transient, then new consistent data will be written to the sector.
    395 If the damange is permanent, then the write will force sector reallocation. Please see [//browser/trunk/www/badblockhowto.xml Bad block HOWTO] for instructions about how to force this sector to reallocate (Linux only).
     395If the damange is permanent, then the write will force sector reallocation. Please see [wiki:BadBlockHowto Bad block HOWTO] for instructions about how to force this sector to reallocate (Linux only).
    396396
    397397The disk still has passing health status because the firmware has not found other signs of trouble, such as a failing servo.
    398398
    399 Such disks can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility.  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [//browser/trunk/www/badblockhowto.xml Bad block HOWTO] for generic Linux instructions.
     399Such disks can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility.  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [wiki:BadBlockHowto Bad block HOWTO] for generic Linux instructions.
    400400
    401401----
     
    409409If your disk has an unreadable sector, this means that some of your data can't be retrieved.  You can force the disk to replace the unreadable sector with a spare good sector, but only at the price of losing the 512 bytes of data forever.
    410410
    411 Disks with uncorrectable sectors can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility (see previous FAQ entry).  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [//browser/trunk/www/badblockhowto.xml Bad block HOWTO] for generic Linux instructions.
     411Disks with uncorrectable sectors can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility (see previous FAQ entry).  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [wiki:BadBlockHowto Bad block HOWTO] for generic Linux instructions.
    412412
    413413Normally when an uncorrectable sector is found, the disk puts this onto a 'pending sector list' to indicate that it should be replaced with a spare good sector.  However this replacement won't take place until either the disk can read the data on the bad sector, or is instructed to write new data to that bad sector.