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Forum Discussion
Looking to fit 3TB Enterprise drives to ReadyNAS Duo or NV+
I currently have 2x Seagate ST31000340NS in a ReadyNAS Duo (RND2000 v2), and would like to increase the capacity to 3TB with a pair of the Seagate ST33000650NS drives. Could anyone offer some advice ...
-I would go with the WDC W30EFRX over a Seagate consumer drive. Google the forums on the drive model before you purchase. Regrettably the HCL is not as good a guide as it once was.
-If you take a hint from the ReadyNAS 4200 HCL, then you might also consider a WDC RE WD4000FYYZ. That is an enterprise drive, and is the first 4 TB model to be on the HCL.
I do not have first-hand experience with the Hitachi or the WDC 4TB drive. I have several W30EFRX and am pleased with them.
-The growth limit (from your initial install/last factory default) is 8 TB, not 4 TB. There is also a hard stop at 16 TB total volume size. So if you started with 4x3TB XRAID2 (RAID-5), you'd have about a 9 TB volume. You could grow to 4x4TB, since that would take you up to 12 TB. The hypothetical 4x8TB would give you 24 TB with RAID-5. Assuming they worked with the v2, you'd need a factory default - which would give you the full space.
-You can alternatively create mirrored drives (2 volumes on the system). You'd need to choose flex-raid at the initial install. Of course, two mirrored volumes (RAID-1 pairs) won't give you the same capacity as RAID-5. With mirrored pairs, you could expand from two 3TB pairs (6 TB total) to two 8 TB pairs (16 TB total). I'm not certain if the v2 will expand each volume (as XRAID-2 would), or if you'd need to create additional volumes to use the extra space. You'd also be able to destroy the volume and start over.
ext4 volumes have a limit of about 1 million TB. So the practical limit could be your wallet.
-If you take a hint from the ReadyNAS 4200 HCL, then you might also consider a WDC RE WD4000FYYZ. That is an enterprise drive, and is the first 4 TB model to be on the HCL.
I do not have first-hand experience with the Hitachi or the WDC 4TB drive. I have several W30EFRX and am pleased with them.
-The growth limit (from your initial install/last factory default) is 8 TB, not 4 TB. There is also a hard stop at 16 TB total volume size. So if you started with 4x3TB XRAID2 (RAID-5), you'd have about a 9 TB volume. You could grow to 4x4TB, since that would take you up to 12 TB. The hypothetical 4x8TB would give you 24 TB with RAID-5. Assuming they worked with the v2, you'd need a factory default - which would give you the full space.
-You can alternatively create mirrored drives (2 volumes on the system). You'd need to choose flex-raid at the initial install. Of course, two mirrored volumes (RAID-1 pairs) won't give you the same capacity as RAID-5. With mirrored pairs, you could expand from two 3TB pairs (6 TB total) to two 8 TB pairs (16 TB total). I'm not certain if the v2 will expand each volume (as XRAID-2 would), or if you'd need to create additional volumes to use the extra space. You'd also be able to destroy the volume and start over.
ext4 volumes have a limit of about 1 million TB. So the practical limit could be your wallet.
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