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Hitachi seem to be in stock in many online stores even my local MicroCenter has 10+ in stock.
Frédéric Segard wrote:
My question is, all other things being equal, with drives of the same series, will I see an advantage in performance with SAS2 over SATA3? Or is it just about reliability?
I am not sure what you are asking here. Is it this (Constellation2) that you are asking about when you refer to SAS2? Or are you asking about interface transfer rates?
Probably they ran out of stock locally and never reordered... don't know the exact reason why it's a hassle to get the drives.
Yes, my questions is, as an example, of the Constellation.2 drive series, which is faster? The SAS version, or SATA version? Because, other then the circuit board, the rest of the drive is the same.
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The only difference that I could see from the specsheets is that the SATA drive is slightly less power than the SAS drive. With the same cache and same rotational speed and same bit density I would guess there is no speed advantage. The SATA drive is slightly (~$30) less expensive. There may be some feature differences that come into play but I do not know any off the top of my head. That would be a good question to ask Seagate. Now what I did was to go to SAS because it was the only way to get the 15,000 rpm disks and I took a slight risk in that I bought drives that were pulled out of Dell demo equipment and only paid half-price of new drives.
I could not help think of you when I saw this package deal for your 1.5 TB Hitachi drives from a good source that actually got Areca board for me.
I don't know why I didn't see this link earlier... probably because I was too tired. Anyway, it seems like a pretty honest and unbiased assessment of the differences.
In essence, SAS offers more security and integrety. But in a single drive setup, SATA is faster. Whereas, in a RAID setup SAS performs better. Is it worth $30 per drive more? Is the performance and security gain worth it at that price? It depends on budget and needs, granted. Probably. Unfortunately, I have yet to see benchmarks that will indicate performance gain. My uneducated guess would be in the single digit percentile.
Message was edited by: Frederic Segard
I began going through the list of cost effective drives that can do parity AND non-parity RAID.
Um...why can't any drive do both?
The 1.5 says it's discontinued on NewEgg. I picked up a few more from OWC for an external drive. I have 8 total that I can use for a RAID and have a few in case of drive failier, if I go with a RAID 3 or 5. Not the best timing to buy these but what can you do?
My vendor found a distributor who still carries the Hitachis. Good thing!