RAID 10 new setup TI 2013 with Plus Pack WIN 7
Trying to set up SansDigital TR5UT+ with Highpoint included controller. Disk management recognizes this as K: with 4 identical 2TB disks of 1862.99 GB each with a capacity of 3725.94. I wish to do a mirror image of internal SSD C: onto disks 1 and 2 of this K: external unit. Then mirror image internal drice D: onto disks 3 and 4 of this unit. Do I need to synchronize the drives before doing RAID 10? While this be a problem with a separate SansDigital unit set up as a JBOD copying these two internal drives of different sizes? It looks like I would perform a Disk and partition backup and select C: but how do I know it will select only disks 1 and 2 on K:. How do I then mirror image internal D: onto the 3rd and 4th disks. I read the PDF manual but did not see this addressed.
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Richard,
If you are running a RAID 10, you don't get to choose which disks you are saving to. You will be writing to the RAID 0 array which is protected by the RAID 1 mirror forming the RAID 10.
RAID 10 will give you the speed of RAID 0 with the redundancy of a Mirror, but does not offer parity which can be higher performing and more economical. In addition, a more efficient use of disks and power. I have to say can be because it depends on the controllers software. I am not familiar with the clone or nWare proprietary RAID features built into this particular unit. It states it will protect your data, but doesn't say how exactly.
I agree with Colin. In order for the RAID 0 array to be protected, the mirror (other half of the RAID 10) would need to be functioning and be synchronized with the RAID 0 array first.
RAID 5 is a more economical way to gain performance with a certain level of protection. RAID 10 introduces more cost and overhead, but provives a higher level of redundacy since the likelyhood of more than 2 disks failing at the same time is slim.
Synchonization between the Raid 0 array and Mirror is handled automatically according to what I read on the SansDigital website. It also states it will automatically rebuild a failed member of either array. I would visit their user forms and see what others are saying about disaster recovery and their overall success. I can say one thing for sure. All of the data must be backed up. You cannot rely on any RAID level to protect your data. Also, SOHO units like this typically require 1-4 days of rebuild time should one of the member disks fail. Just keep this in mind.
***Edit** After more reading on the SanDigital website, I see that their implamentation of RAID 10 differs slightly. True RAID 10 is data written in stripes across primary disks (RAID 0) that have been mirrored to the secondary disks (RAID 1). SansDigital actually write to the mirror R1 (mode). Speed is achieved through the other 2 drives R0 (mode) and the data is striped (interleaved) between the two sets. According to their documentation writes are made to the R1 mirror in this configuration on their hardware. I'm not an expert either, but do use and support RAID both personally and professionally.
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