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Need To Confirm Questions About X-RAID and ReadyNAS 628X
I have two RN628X systems. One has five 12 TB Seagate Ironwolf HDDs. The other has four 16 TB Seagate Ironwolf HDDs. Both are configured in the default X-RAID. I have the understanding, perhaps w...
XrayDoc88 wrote:
I have the understanding, perhaps wrong, that it is always best practice to build your
RAID arrays with same Manufacturer, same model and size HDDs.
Opinions on this vary. Some intentionally use different manufacturers.
I generally have gone with the same line of drives (most or my systems are using WD Red Plus), but I did replace one failed WD Red Plus drive recently with an Ironwolf, and had no problems at all.
As far as size goes, XRAID does support unequal disk sizes, so you can expand by replacing existing disks with larger ones. Note that you need to upgrade two disks to the larger size in order to get the full capacity. The capacity rule is "sum the disks and subtract the largest".
XrayDoc88 wrote:
1. Would there be any problem adding the Seagate Ironwolf "PRO" HDDs to these two systems, instead of the non pro versions?
That will work. You might get a warning about mismatched RPM, but it is safe to ignore that.
XrayDoc88 wrote:
2. Is it actually OK to add a 16 TB HDD to the 12 TB system? I believe it will only add 12 TB of storage until all HDDs are actually changed individually to 16 TB models. Then you would gain the extra 4 TB per drive, minus the parity drives.
It is ok. As I clarified above, you will gain 4 TB of space when you upgrade (or add) a second 16 TB drive. Then 4 TB for each drive after that.
XrayDoc88 wrote:
3. On the 12 TB system with 5 drives currently, adding a 6th drive will convert the X-RAID 5 to X-RAID 6? I will actually have to add two more hard drives to gain any storage capacity, correct?
Desktop NAS will convert to RAID-6 when you add the 7th drive (6 drives remain RAID-5). You do want to make sure you have at least 3 drives of the largest size installed when you add the 7th - otherwise the system won't be able to convert.
XrayDoc88 wrote:
I have the understanding, perhaps wrong, that it is always best practice to build your
RAID arrays with same Manufacturer, same model and size HDDs.
Opinions on this vary. Some intentionally use different manufacturers.
I generally have gone with the same line of drives (most or my systems are using WD Red Plus), but I did replace one failed WD Red Plus drive recently with an Ironwolf, and had no problems at all.
As far as size goes, XRAID does support unequal disk sizes, so you can expand by replacing existing disks with larger ones. Note that you need to upgrade two disks to the larger size in order to get the full capacity. The capacity rule is "sum the disks and subtract the largest".
XrayDoc88 wrote:
1. Would there be any problem adding the Seagate Ironwolf "PRO" HDDs to these two systems, instead of the non pro versions?
That will work. You might get a warning about mismatched RPM, but it is safe to ignore that.
XrayDoc88 wrote:
2. Is it actually OK to add a 16 TB HDD to the 12 TB system? I believe it will only add 12 TB of storage until all HDDs are actually changed individually to 16 TB models. Then you would gain the extra 4 TB per drive, minus the parity drives.
It is ok. As I clarified above, you will gain 4 TB of space when you upgrade (or add) a second 16 TB drive. Then 4 TB for each drive after that.
XrayDoc88 wrote:
3. On the 12 TB system with 5 drives currently, adding a 6th drive will convert the X-RAID 5 to X-RAID 6? I will actually have to add two more hard drives to gain any storage capacity, correct?
Desktop NAS will convert to RAID-6 when you add the 7th drive (6 drives remain RAID-5). You do want to make sure you have at least 3 drives of the largest size installed when you add the 7th - otherwise the system won't be able to convert.
I made a mistake in describing my 12TB NAS. It actually has six 12TB HDDs installed currently, not five.
"You do want to make sure you have at least 3 drives of the largest size installed when you add the 7th - otherwise the system won't be able to convert."
I don't understand this statement. Will it convert to RAID 6 and will I gain storage capacity if I add one 12TB and one 18TB HDD to my NAS? Also, if yes, should I add these new drives one at a time, first the 12TB to convert to RAID 6, and then add the 18TB to gain storage?
Thanks again!
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