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Tech support

Technical support system
Please direct your questions to the support "ticket" system. This includes both sales questions and technical questions.

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ZAR FAQ
Can I check the quality of data recovery before I purchase?
Yes. Demo versions of our software allow you to recover a limited number of folders so you can inspect the files and verify the recovery quality. Download ZAR now.
Can ZAR recover my files if the MBR is damaged?
Yes, ZAR can still recover files even if the MBR is missing - just follow the tutorial on data recovery in case of MBR damage. Either manual or automatic scan mode is available.
This is not a problem for ZAR. Its autodetection feature will take care of this without requiring any additional input from you.
Can I use ZAR to recover data on CDROMs or DVDs?
No, we do not support these types of device. There are separate utilities available from other vendors for this.
Will ZAR recover data if a hard drive is not recognized in the BIOS?
No. A drive is beyond usual software repairs if it cannot be recognized by the BIOS.
It requires either physical repairs or firmware reconstruction. This assumes everything is properly configured (check the data and power cables).
Can ZAR fix a damaged partition table?
ZAR never modifies a damaged disk. You can copy data off the damaged disk using either version, reformat the disk and copy the data back to it. Once again, ZAR is read-only.
Miscellaneous tips
FDISK destroys some data during repartitioning.
While "checking disk integrity" FDISK writes hexadecimal F6h into the first sector on each track. If you have accidentally deleted a volume, do not try to create it again using FDISK - as it will corrupt your data further.
My system BIOS reports something like "Primary Master HDD S.M.A.R.T. status bad, backup data immediately" during startup. What the hell is that?
Backup your data immediately! This is an indication that one of your hard disks is physically failing.
Specific jumper settings required to run Western Digital hard disks.
When an old generation WD drive is sitting singly on its channel (with no CD-ROM or other HDD attached on the same IDE channel), and the jumper on the disk is set to Master, the system BIOS may refuse to detect the disk, thus rendering the system unbootable.
Solution: if you experience these symbthoms, remove the jumper from the HDD, or set it so it does not short any pins. This will set the drive to Single (also known as Single Master) mode, and it will operate properly.
Overclocking can cause an IDE controller/disk failure, leading to data loss.
We receive many requests from people asking, "I have a system with Celeron a 400MHz at 600MHz, [other system info]. It was running for a month, but now the system refuses to start ("DISK BOOT FAILURE" error). What's the problem?". The problem is that the IDE controller and/or hard disks are sensitive to overclocking. Actually things are even worse: CPU and memory problems can be easily determined by stress testing, but rarely does one test the disk subsystem. Later on a heavy load is put on the disks and they fail.
If this happens, the first thing to be done (before proceeding with data recovery) is to revert the system frequencies to their rated values. Failure to do so may lead to further corruption of the drive's data.
What does "remapping" and "remapped sectors" mean?
Remapping is an automatic drive self-repair technique. In order to allow this, some sectors on the drive are initially not used, but form a ''spare pool" instead. Once a write error occurs, the sector that causes it (a bad sector) is ''replaced'' with a spare sector from the above-mentioned pool. This is done by redirecting all the bad sector access requests to the corresponding spare sector via the on-disk controller, eliminating the need of any software handling of the error. The bad sector is thus excluded from use without any loss of capacity.

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Copyright © 2001 - 2017 Alexey V. Gubin.