G-Technology has long been a favourite of Mac creative professionals, and no small part of this is the clever use of silver aluminium that perfectly matches Apple’s iMac casing, keeping desktop areas with a uniform appearance. The latest incarnation of its G-RAID dual hard disk Thunderbolt product isn’t just a start performer, capable of 440 MB/sec transfer rates in RAID 0, which is. RAID 0 is susceptible, but it is okay as long as a backup copy is kept! Learn More About the Types of RAID. RAID 0 (Stripe) RAID 1 (Mirror) RAID 10 (1+0) RAID 5 (Stripe with Parity) JBOD (Just a Bunch Of Disks/Drives) Span (N-RAID).
The Mac OS X operating system allows its users to create only software mirrors and stripe sets (RAID 0). For the latter, it's necessary to specify some parameters when creating their virtual counterparts in R-Studio for data recovery. If those aren't known, most likely they have the following default values:
- Offset: 0
- RAID type: RAID0 (Stripe set)
- Block size: 32 kb (64 sectors)
- Block order: Default
A typical virtual RAID setup for such stripe set is shown on the Fig.
Fig. RAID parameters and layout for a default software stripe set created in Mac OS X
Click image to enlarge
Please note the following:
- The virtual RAID should be created from the Raid partitions.
- The RAID parents should be placed in the correct order.
- The Block size parameter may have other (non-default) values: 16KB (32 sectors), 64KB (128 sectors), 128KB (256 sectors), and 256KB (512 sectors).
Please remember that stripe sets (RAID 0) don't provide any means to protect data against its lost due to disk failure. If any disk from such RAID layout physically fails beyond recovery, all data from the entire RAID setup will be lost completely.
Lenovo p520 drivers. If all disks of a stripe set (RAID 0) are healthy and no data on them is corrupted, R-Studio should be able to re-construct it structure and recover its files.