The most FIRMWARE problems we have encountered with SAS hard drives manufactured by SEAGATE.
Also there are hard drives with the HP or DELL logo, which are really SAS, SCSI manufactured by SEAGATE or IBM.
There are also drives of the class ENTERPRISE which can also have MECHANICAL failures, in such cases there are mechanical procedures can lead to recovery if there are no surface failures. In many cases along with the deterioration of the assembly of reading / writing pins, the surface area is also deteriorated. In some situations the recovery of data can only occur partially or in worst cases they cannot be recovered.
It is rather rare that SAS or SCSI have ELECTRICAL problems, but if it should happen, we have solutions available. Do not attempt to exchange the electrical parts from one hard disk to another. Very often this could lead to the deterioration of the FIRMWARE area of the hdd on the surface of the platters.
SAS and SCSI are used in servers which are not configured in RAID 0, 10, 4, 5, 6; the recovery procedure becomes more complex. 3 steps are practically required for the recovery:
- defect SAS, SCSI
- reconstruction of the RAID matrix
- data recovery by LOGICAL procedure from the rebuilt matrix
The LOGICAL recovery can vary according to the file system used for the formatting RAID matrix: NTFS, EXT2, EXT3, ReiserFS, XFS, UFS, HFS......
If you have a SAS drive with problems or if you have servers with SCSI, SAS hard disks which are not working, please contact us . You can find more data concerning the means of sending hard drives here.