[Ubuntu-ni] Problemas de Disco Duros

Marcelo Gutierrez mmgc84 en hotmail.com
Mar Mar 17 17:31:47 GMT 2009

Buenos dias lista.

Este articulo lo tome de StorageReview.com, tiene que ver con el trato que se le da a un disco duro y los problemas que esto trae. Tambien hay algunos concejos locos para "talves" hacer trabajar un disco duro malo lo suficiente para sacar la informacion. Esta en ingles, si alguien lo quiere traducir y despues reenviarlo bueno, yo no tengo tiempo.

1-Drive Bumps:

	One of the most common causes of
failures happens as soon as the installation phase: the dreaded
When you hit a hard surface (such as your
case) with the harddrive (during installation, for example), a
"little" bump will very likely generate a shock of several
Gs (probably more than 100Gs!), making the head scratch the disk
surface and creating little indentations. The indentations and the
tiny material particle generated both *will* (not may) cause problems
sooner or later (maybe not noticeable before a year or more!). 

2-Drive Orientation:

	Modern drives should suffer no ill
effects from variable mounting orientations. There is some consensus
that it is best to mount drives with at least one of the drive's
sides parallel to the ground. 
It is also safe to change the
mounting orientation even after the drive has been established in an
initial orientation. In older drives, according to StorageReview member Mickey,
changing the mounting orientation once it has been established can
cause failure if there was uneven bearing wear. Reasonably modern
drives should not be troubled by this problem.

3-Death Clicks:


Simply put, the "Clicks of Death"
are a very bad sign for the health of a HDD. They are loud clicks
which appear mostly while the drive is seeking. They most probably
mean a failing drive, ready to develop bad sectors and die. Start
backing up your data and prepare for RMAing the drive if you are
still in warranty. 

Some drives click once or twice when
either powered up or powered down. These are normal sounds. Sounds of
your drive clicking repeatedly are cause for concern. 

4-Data Recovery:

	First, check the obvious: jumpers,
power cables, IDE (or SCSI) cables are firmly seated. 
If you
are sure that your drive has failed, shut down the drive. You need to
make an honest assessment about how much you value your data. If you
absolutely have to get the data back, do not attempt any
homebrew recovery methods. While some are not destructive, the more
you use a failed drive, the harder it becomes for professional data
recovery firms to get back your data (and thus, the more it'll cost).
A good place to start for a list of recovery firms is to visit your
HDD maker's website. They usually have a recommended list of firms;
this ensures that your warranty is preserved. 

If I had to
list a few of the more common tricks, they would be as follows:

Drive refuses to spin up (no noises): 
- Clean contacts
between board and motor. 
- Make sure the board is not shorting
out against the drive. 
- Check power cables, connectors, etc. 
Board swap, trying to match make, model, vintage. 

refuses to spin up (chirps or other noises): 
- Tap drive (or
firmly shake it) while it tries to spin. 

Drive spins, but
loudly clicks/chirps: 
- Freezer trick: pack drive in ESD bag,
tape shut, shove in freezer for a few hours (or overnight). Remove
from freezer and immediately plug into a known working system as a
slave drive, then hope it spins up and behaves long enough to copy

These are the more generic "tricks" that are
unlikely to further damage your drive.

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