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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

SAS expander chassis / AttoH680

Havent' used that specific SAS enclosure, but you're looking at 6 bays per SAS/SATA channel through the expander. At least it's 6Gbps per channel.

The real down-side here is that's a lot of drives and no good way to manage or monitor them, other than their onboard LED's... No redundant power. Definitely run this thing through a good power conditioner and be sure you have a way to get replacement parts for it, primarily the PSU and expander PCB. Additionally, you will have to configure RAID volumes on the host system, since it's just an expander/JBOD arrangement. So in that regard, I would not recommend the ATTO H680, as it's not a RAID controller. And no way would I want to configure 24 drives through an expander into a software RAID.

I would go for the ATTO R680 SAS card. Then set up as a RAID 5+0 arrangement reserving 4 of the drives for 'hot-spares'. So each of the 4 channels would have 6 drives connected in a RAID set configured as 5 drives in RAID-5 with the 6th as the spare. Then do a RAID-0 stripe of the 4 arrays.

If it were me, I would probably look at other more robust solutions if you're wanting to run that many drives or store any semi-critical data.
 
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Hey Jeff,

Thanks again for your terrific advice. I truly appreciate it.

I stopped trusting Raid 5's a while ago when I once really got burned on it.
So what I am planning to do is to divide the enclosure into several Raids, which also
makes it easier for me to get organized.

I configure them as Raid 0 for speed and then have another mirrored Raid set for every
primary Raid set. I sync those Raids every night. So I basically have two identical sets.
Plus I always have a third backup of all media and project files...

Which enclosure / storage solution are you using if I may ask you to reveal your secret potion ?

Thanks

axel




Jeff Kilgroe said:
Havent' used that specific SAS enclosure, but you're looking at 6 bays per SAS/SATA channel through the expander. At least it's 6Gbps per channel.

The real down-side here is that's a lot of drives and no good way to manage or monitor them, other than their onboard LED's... No redundant power. Definitely run this thing through a good power conditioner and be sure you have a way to get replacement parts for it, primarily the PSU and expander PCB. Additionally, you will have to configure RAID volumes on the host system, since it's just an expander/JBOD arrangement. So in that regard, I would not recommend the ATTO H680, as it's not a RAID controller. And no way would I want to configure 24 drives through an expander into a software RAID.

I would go for the ATTO R680 SAS card. Then set up as a RAID 5+0 arrangement reserving 4 of the drives for 'hot-spares'. So each of the 4 channels would have 6 drives connected in a RAID set configured as 5 drives in RAID-5 with the 6th as the spare. Then do a RAID-0 stripe of the 4 arrays.

If it were me, I would probably look at other more robust solutions if you're wanting to run that many drives or store any semi-critical data.
Click to expand...
 
I use iStoragePro SAS expander with R380 and working okay. It seems it is slower than normal SAS connection, but since it is more convenient, you have more freedom to connect LTO drives and other expander boxes so you have better chances backing up your important projects.
 
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