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Had a Hard Drive Start Knocking...
Posted: Mon Apr 19, 2010 7:50 pm
by Apoptosis
Not what you want to see on your hard drive:

- dead_velociraptor.jpg (114.44 KiB) Viewed 9540 times
should look like this:

- good_velociraptor.jpg (104.72 KiB) Viewed 9539 times
Re: Had a Hard Drive Start Knocking...
Posted: Mon Apr 19, 2010 9:58 pm
by geokilla
Is there a difference between the two pictures besides the health status?
Re: Had a Hard Drive Start Knocking...
Posted: Mon Apr 19, 2010 10:01 pm
by stunts7058
yea the unrepairable sector count has a yellow dot and has 5 on the top one and none on the bottom one
Re: Had a Hard Drive Start Knocking...
Posted: Tue Apr 20, 2010 5:32 am
by bubba
Shows how much ware and tear power cycles has on hard drives.
Bad drive: 102 power cycles in 5695 hours
Health drive: 36 power cycles in 6854 hours
Re: Had a Hard Drive Start Knocking...
Posted: Tue Apr 20, 2010 6:26 am
by FZ1
At least you have an early warning.
Re: Had a Hard Drive Start Knocking...
Posted: Tue Apr 20, 2010 7:44 am
by Apoptosis
bubba wrote:Shows how much ware and tear power cycles has on hard drives.
Bad drive: 102 power cycles in 5695 hours
Health drive: 36 power cycles in 6854 hours
They came from the same system and were installed on the same day
Good thing they were in a big RAID array.
Re: Had a Hard Drive Start Knocking...
Posted: Tue Apr 20, 2010 9:43 am
by bubba
Wonder why they were powering up and down differently.
Re: Had a Hard Drive Start Knocking...
Posted: Tue Apr 20, 2010 8:28 pm
by Sparky
I couldn't tell looking at your screen shots, but what program are you using to monitor your HD's? CDI??? I've used HD Health in the past but yours look much more informative.
Re: Had a Hard Drive Start Knocking...
Posted: Wed Apr 21, 2010 2:16 pm
by Apoptosis
Sparky wrote:I couldn't tell looking at your screen shots, but what program are you using to monitor your HD's? CDI??? I've used HD Health in the past but yours look much more informative.
Yeah Crystal Disk Info -
http://crystalmark.info/software/Crysta ... dex-e.html
Re: Had a Hard Drive Start Knocking...
Posted: Wed Apr 21, 2010 7:59 pm
by Sparky
Thanks for info and the link. Glad I tried this test. HD Health shows everything fine but as you can see, one of my spares is about to die on me.
Re: Had a Hard Drive Start Knocking...
Posted: Thu Apr 22, 2010 6:50 am
by Apoptosis
Attribute Name: Reallocated Sectors Count
Attribute ID: 05
Description: Count of reallocated sectors. When the hard drive finds a read/write/verification error, it marks this sector as "reallocated" and transfers data to a special reserved area (spare area).
This process is also known as remapping and "reallocated" sectors are called remaps. This is why, on a modern hard disks, you can not see "bad blocks" while testing the surface - all bad blocks are hidden in reallocated sectors. However, the more sectors that are reallocated, the more a sudden decrease (up to 10% and more) can be noticed in the disk read/write speed.
You might be able to 'fix' the sectors with a low-level format.
Re: Had a Hard Drive Start Knocking...
Posted: Thu Apr 22, 2010 12:43 pm
by kenc51
An exceptional bit of software, which has been around for years and is free; is "MHDD"
You can use this to do the low level format as Apoptosis said but if there are unrecoverable sectors, MHDD can nuke them for you.
You loose a little space (couple of MB in most cases), but gain a HDD that performs like new.
If you feel up to it, you could even tell it to kill all sectors that take longer than say ~3msecs to "flip" (go from 1 to 0). This will turn your hdd into a super fast drive, but you'll loose ~3/4 of space on an older disk.
http://hddguru.com/content/en/software/2005.10.02-MHDD/
Be careful when using as any sectors marked as dead are dead forever, the changes cannot be undone in the hdd firmware even if the sectors are good!
Re: Had a Hard Drive Start Knocking...
Posted: Thu Apr 22, 2010 6:19 pm
by Apoptosis
Re: Had a Hard Drive Start Knocking...
Posted: Thu Apr 22, 2010 8:27 pm
by Sparky
Apoptosis wrote:Attribute Name: Reallocated Sectors Count
Attribute ID: 05
Description: Count of reallocated sectors. When the hard drive finds a read/write/verification error, it marks this sector as "reallocated" and transfers data to a special reserved area (spare area).
This process is also known as remapping and "reallocated" sectors are called remaps. This is why, on a modern hard disks, you can not see "bad blocks" while testing the surface - all bad blocks are hidden in reallocated sectors. However, the more sectors that are reallocated, the more a sudden decrease (up to 10% and more) can be noticed in the disk read/write speed.
You might be able to 'fix' the sectors with a low-level format.
Thanks for the article, I read a few last night after I ran the test. I'll just toss another one of my spares in, it's not my master, just a back up drive. I've had the Maxtor that's failing for a few years now so I got my monies worth out of it.