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robnicholson wrote:I suspect this is a simple question with a complex answer. We're in the market for a SAN as we a) need more disk space, b) want to improve flexibility in virtualisaion and expansion and c) want to mitigate against hardware failure for better business continutity.
So we've got quotes in for EqualLogic and Xiotech. Both very good with some great reviews & feedback from users. But they are not what you would exactly call cheap! In fact, "taking the micky" might pop up.
We looked at DataCore and liked the product but once again, not the price.
I happened upon StarWind whilst researching the project. Even tried the trial on a spare VM with 8TB eSATA disk enclosure. It was simple to use which I loved. Suspect there is a lot of extra complexity in the SAN world that's there to confuse.
But as for the price - well, it's wonderful. Not got UK pricing from you yet but saw some US prices and rough back of envelope calculation gives me a PowerEdge R710, dual CPU, 8GB RAM, Windows 2008, 8 x 600GB 10k 600GB (~4TB usuable with RAID) for £6000. Add in the most expensive StarWind license and I doubt I'd be spending more than £10k.
Compare this with the £25k+ that I'm been quoted for EqualLogic and Xiotech and it's not surprised I'm interested in StarWind. Heck, for £25k, I could have the same set-up in our UK and USA offices.
But... I worry about the old adage of "You get what you pay for"...
So after waffling on there for a while, this is an open and I hope honest question:
How does would StarWind on something like the above (suspect you'll say more RAM but heck, that adds another £1k) compare with hardware SANS like EqualLogic & Xiotech on the following?
1. Performance (way top of list)
2. Software reliability
3. Hard reliability (appreciate this is mainly outside of your control but others may know)
Cheers, Rob.
PS. Also love the idea that we can have a split 4TB SAS fast drives but also mix with a cheap-as-chips eSATA disk enclosure if we get the right StarWind license.
robnicholson wrote:On a similar subject - iSCSI performance. I've read more than I want to on this subject over the past few weeks but I'd sort of come to the conclusion that for our set-up (100 office type users), that the potential speed increase of fibre over iSCSI just wasn't worth the extra costs and loss of flexibity (i.e. with iSCSI, almost any PC could be immediately connected to SAN without having to worry about £££ HBA).
General wisdom was that in most instances, it was the speed of the disk system that would be the bottleneck, not how fast the files can be transferred over 1gbit/s Ethernet.
But they I came across a post on here that said:
1) Cheap high capacity SATA drives. SAS is not going to help much as network is the bottleneck here.
2) As much RAM as you can install. We'll use every free byte as a cache.
3) Two HA nodes with Write-Back cache configured. HA makes multi-gigabyte WB cache safe to use.
4) Multiple RAID sets. To ensure you can rebuild them separately.
No problem with 2-4 but #1 surprises me.
Cheers, Rob.
robnicholson wrote:Hmm, whilst 10Gbe cards are getting cheaper, switches are still pretty stiff.
Regards, Rob.