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Forum Discussion
Looking for recommended future-proof setup for Pro 6
Hei, I am about to buy a Pro 6 as replacement for my single drive 2TB NAS. I plan on using X-RAID2 and am wondering about my initial disk setup. As 3GB disks still have some price premium here in E...
If you are going with dual redundancy under X-Raid2, then 4 drives is indeed the way to go. Dual redundancy requires 4 drives of identical capacity. The specific comment was about vertical expansion.
There are two forms of exapansion, horizontal which is triggered by adding drives and the vertical by replacing some or drives with larger drives. Adding larger drives to an existing array of smaller drives that do not fill all the slots may do both.
Single redundancy will allow the array with your data to survive the failure of a single drive. This requires at least two drives of the same size. Dual redundancy (only available on units with 6 or more bays) requires 4 or more disks of the same size.
Going from a one drive NAS to a 6 bay unit is a big change. You can start with as few as 2 drives and single redundancy and later as you add drives when you have enough, you can switch to dual redundancy if desired. Dual redundancy is recommended with 6 drives, but just remember you only get the storage space of 4 drives (2 of the six provide redundancy). For this reason, when I was buying a new ReadyNAS, I could not justify the additional expense of the 6 bay Pro. I went instead with two 4 bay units (NVX) with the second backing up the first. Remember, a ReadyNAS, even with dual redundancy is not a backup plan.
RAID will protect against drive failure, but if there is a problem with the array, or there is a problem or catastrophe with the unit you data could still be gone.
There are two forms of exapansion, horizontal which is triggered by adding drives and the vertical by replacing some or drives with larger drives. Adding larger drives to an existing array of smaller drives that do not fill all the slots may do both.
Single redundancy will allow the array with your data to survive the failure of a single drive. This requires at least two drives of the same size. Dual redundancy (only available on units with 6 or more bays) requires 4 or more disks of the same size.
Going from a one drive NAS to a 6 bay unit is a big change. You can start with as few as 2 drives and single redundancy and later as you add drives when you have enough, you can switch to dual redundancy if desired. Dual redundancy is recommended with 6 drives, but just remember you only get the storage space of 4 drives (2 of the six provide redundancy). For this reason, when I was buying a new ReadyNAS, I could not justify the additional expense of the 6 bay Pro. I went instead with two 4 bay units (NVX) with the second backing up the first. Remember, a ReadyNAS, even with dual redundancy is not a backup plan.
RAID will protect against drive failure, but if there is a problem with the array, or there is a problem or catastrophe with the unit you data could still be gone.
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