Largest drive in Snap 18000 and SD30SA Expansion unit

[sethdf]

Hello,

I have a Snap 18000 with an SD30SA expansion unit for a total capacity of around 4TB. I have not been able find a good answer on the max allowable drive size (while not regarding the craziness of giant drives and RAID 5, etc). Overland said it was 400GB and I see some reports of 1TB up to 2TB drives in Snap units.

Also, is there a newer, comparable Snap model that can be used for comparision?

I apologize if this question is answered somewhere on the forum of by a comparable unit listed in the drive reference area.

Thank you.

[Phoenix32]

In this case, I think it is going to come down more to an OS limit. When I can find a SD30 for a decent price for my Snap 15000 I'll let you know.

[sethdf]

Do you mean an OS limiting supported Raidset/Group sizes or limiting the size of actual drives?

[Max8]

I am also keen to see what sizes have been added to an 18000....

My 18k has 8x 250GB's, not sure I would go larger than 8x 1TB's personally, I would have trouble using half of it in the next 3 years...
8x 1TB's would make for 6.447TB Useable Approx. in Raid 5 (or 5.526TB in Raid 5 + hotspare)
Either way it would be a bit over overkill for me...

Can we confirm;
1 - The only real limitation for 520/620 + S50 SNAPS apart from 88 Physical HDD's apparently is 16tb being the maximum Volume sizes... you can make many arrays and you can join separate volumes to counter that but you cannot go larger then 16TB for a volume...

2 - One should not RAID more than 12 Drives in one hit as rebuild times are a killer, I have heard that "6x drives is best for ensuing rebuild time of less than 12 Hours

I have never sold more than 40x drives in one system but back then they were 500GB's and as you are supposed to avoid Raid-ing or Volume-ing across physical units we did not encounter the issue...

Not sure if there are hardware issues with SD30's 15000's, 14000's etc but the only limitation the SD30 has is that you could only daisy chain 3x SD30's to a snap... that's 48 HDD's not including the head unit...

[sethdf]

I second MAX8's request for confirmation of his points.

In the meantime, I'm going to get some 2TB drives and see what I can do. If they work, I'll populate the 18000 and the SD30 with them (24 drives) and use RAID10.

[sethdf]

Hello,

On the 18000, I was able to successfully create a RAID1 array with 2 WD 2TB drives (model WD2002FYPS) along with one spare. I will be adding six more to try and create a RAID10. If I get brave, I might go with RAID6, but rebuild times are scary.

It is running the current GuardianOS (5.2.056) and I have only, so far, added drives to the SD30 expansion unit.

[N4631X]

I'm trying to get my boss to add a SNAP 18000 to our Windows 2008 server network. Most of our PC's are Win XP, but I think we will be going Win 7 soon.

Will I have a problem getting the PC's and Server to talk to the SNAP 18000.
I believe it's running 4.03 OS.