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Difference Between SAS Drive Technology - Large-LFF and Small-SSF

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by alsolaih

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Dear all;

What is the difference between SAS Drive Technology : Large-LFF and Small-SSF, and which is better ?

thanks

8 replies

by Member 25348569

SFF is currently only available for small disks but it's quieter, greener, more reliable and (obviously!) smaller. Thus, the server will hold more spindles for a given physical space and so you'll probably get better performance but the cost will be higher for a particular RAID capacity.

HP are only using SFF so there's a pointer there.

What do you want do do with your space?

by alsolaih

Is that means the SAS LFF isn't reliable? not good ?
you know I'm going to take this server:
Part number: 470065-300
HP ProLiant DL380G6 E5520/3x2GB RAM/1x300GB 15K SAS
HDD/1x460W/ Rack Server

The server is shipped with one drive: 300G/15k SAS LFF, and i'm going to take one more to make raid 1 (mirror).

actually I'm confused about the drive, or you can say about buying this server.
I want to use this server to act as a domain controller? (only AD, DNS, DHCP)

Any advice please.

thanks

by Member 25348569

You're not going to get any benefit of any increase in the number of spindles. It's really quite complicated in that SFF has, they say, slower transfer rates than 3.5" LFF drives do, but they beat them in access time. There are much more significant factors in the interface - G6 should have a 6G SAS interface (with the right firmware) if my reading of our server spec is anything to go by.

You'll be fine with your server spec above and SFF or LFF won't matter at all. It should fly...

:)

by gadgetgirl

:)

- and I know what I'd like to do with YOUR space...... ;)

:x

GG

by Member 25348569

I was going to go into some serious technical details about "full stroke" timing and "short stroke" as a method to avoid head repositioning but you'd only get too excited.

How was forn parts?

:x :D

by gadgetgirl

;)

forn parts was great - good getaway. Wanted to hijack Soni's fluffpup, but she wouldn't let me... :( (That dog is GORGEOUS!)

We need catch up. (and dinner! :x ) Hmm - lemme see what's happening in London in the not too distant future.... ;)

You sorted out your sabbatical yet?

:x

GG

Delayed reply: was in other forn parts yesterday - York! :p :p

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