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Setting up RAID 5 on HighPoint 2720SGL - Page 2

post #11 of 13
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Thanks. Everything is working great.

I'm looking into setting up backups. I have never actually backed up my PC other than saving my important files to an external HD. I need to find a good application set up automated backup.
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post #12 of 13
Windows 7 has a backup feature, you should try it out and see if it fits your needs.Otherwise you can use Robocopy and the task scheduler in order to automate your backup. If you're looking for something more graphical you can check here and see what you might like.

Glad it's working for you! thumb.gif
post #13 of 13
Quote:
Originally Posted by frenchyaz View Post

The block size will always be 64K (strip), the sector varies from 512b to 4096b however best is to use 512b (hence the warning you got when selected 4Kb). Why? Well, drives are now using advanced format which is 4k and is necessary in order to see the entire drive space so you don't have to take care of that. See this article on the Seagate web site for more information.

Could you tell me why that? I had to think about it for my new Raid 5 and did benchmarking with CrystalDiskMark and it shows faster speeds when choosing 4K sectors.
I think I tested that with 4 new WD Blue 4k/512e HDDs and four older mixed HDDs with 512b and 4K/512e.
I guess the warning is about that older systems / software do not support 4K native/logical sectors (why most HDDs emulate 512b).

About the mixing: It works but I read somewhere that on disk failure you possibly have to replace the failed disk with a same format one.
But I cannot imagine that as I guess since all disks are 512b native or 512e, for the controller the effective internal format makes no difference and it communicates with all disks the same way...?
I could imagine that a Raid wouldn't work at all wenn mixing 512b and 4k native disks without 512b emulation. But it's nonsense anyway - 4k->512e->4K - but if it's faster...
Any further ideas about that?

P. S.
Generally, the 2720SGL works fine for me as long as I don't do any physical changes. But I had huge problems that the controller just didn't want to "see" newly or again attached drives. I was nearly freaking out as I tought I've lost my data now. Rescan doesn't help anything. Don't know what solved it in the end then but I now ran again over this problem with my drive changes. At the end, disconnecting and reconnecting the drives again while the computer is running (even in windows) does the job best and the drives are discovered and ready for use without restarting your OS.

P.P.S Found this - sounds interesting (http://highpoint-tech.com/PDF/Variable_Sector_Size.pdf):
Breaking 2TB: Option 2 - Use HighPoint Variable Sector Size (VSS)
VSS breaks the 2TB limitation by offering an adjustable sector size value in the RocketRAID controller firmware. Each sector size value will support single volumes beyond 2TB and up to 16TB. VSS is a special feature of the RocketRAID 3000 and 2000 Series, and requires a separate BIOS, Device Driver and RAID Management download.

Variable Sector Size (VSS) Values
512B - RAID storage is greater than 2 Terabyte
1K - RAID storage is greater than 4 Terabyte
2K - RAID stroage is greater than 8 Terabyte
4K - RAID storage is greater than 16 Terabyte

I was able to create the raid array and format it with 512b too but didn't test further than CrystalDiskMark.
Edited by Fixy - 4/22/17 at 1:16pm
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