Hitachi's 500GB SATA-II Reviewed 309
Doggie Fizzle writes "The specifications for the Hitachi Desktstar 7K500 are impressive. 500 GB of disk space, 16 MB of cache memory, and 3.0 Gbps of transfer speeds are about as good as you are going to get in today's hard drives. The only category that might be rivaled is transfer speed, but that would require RAID or an Ultra320 SCSI drive to do so. This BigBruin review matches it up with some Seagate drives to show off its performance."
Do the differences matter for "most people" (Score:3, Insightful)
Yes, yes, I know we are the 5%.
-m
Now I can lose even more data... (Score:2, Insightful)
Re:RPM ? (Score:3, Insightful)
Reliability? (Score:2, Insightful)
Re:LATENCY LATENCY LATENCY (Score:1, Insightful)
Re:RPM ? (Score:3, Insightful)
The reviews elsewhere (Score:3, Insightful)
Re:Hitatchi Deathstar (Score:3, Insightful)
No, it wasn't just the 75GB disks, it was the entire series of disks using 15GB platters. They were notoriously unstable, one day you'd boot to the "click of death". If you look at the class action here [ibmdesksta...gation.com] IBM has agreed to settle. Make your claim by August 29, 2005. I lost a 45GB drive to this shit, but I'm not in the US so I don't qualify... I got mine replaced under my own country's consumer protection laws.
Kjella
Re:Hitach's? (Score:2, Insightful)
Re:Do the differences matter for "most people" (Score:5, Insightful)
Not everyone can afford a backup solution, some rely on raid protection, and others rely on a lucky rabbit's foot. Since I am in the 2nd category, (mirrors on anything that matters) I tend to actually look at cost per gb as the primary factor. If a drive fails, I send it in and get another one and resync the mirror. Every drive I buy has at least a 3 yr (if not 5) warranty. In the end, buying cheap drives is more cost effective than buying good drives, and is a lot more cost-effective than buying say a nice DLT drive and a pile of carts. (tho yes, mirror has pretty poor return on cost because of 50% usable space)
As long as I don't have to like swap out a drive more than once a year, I'm quite happy with reliability of even Maxtors. (though I still am not confident enough in my raids to install WD)
That being said, I wouldn't mind accquiring a pair of those 500's, though lately it's been getting a little tricky to find a FW bridge board that supports the really large drives. The last 300 pair I installed, (seagate even!) only one of the 14 bridge boards here would detect at 300. (instead of 128) Yes, they're all ATA6 and have up-to-date firmware, that doesn't seem to matter. WD uses their own "unique variation" on ATA6 for their big drives, so those are really fun to work with, I avoid them like plague.
Big, but noisy? (Score:3, Insightful)
Just the quietest.
Re:500GB finally? (Score:5, Insightful)
Not many consumers need 500GB of HD space in their computer for email and AOL. But 500GB would sure be useful in a Hi-Def PVR. But PVRs are still such a small segment compared to PCs.
Plus, tech wise, we're basically at the top of the S-Curve for the current HD technology. So we need to get the new technology and start the S-Curve all over again. We had a lot of advances when we went from 10GB HDs to 40 and 60GB HDs (one new larger capacity annoucement every quarter almost), but we've started to slow down and stagnate. I'm hoping things get going again soon and we make big advances from 1TB, 1.5TB. 2TB drives.
Personal Media Vaults (Score:3, Insightful)
But the biggest change we have right now is the ability of individuals to have lots of items of the same old size. People watching their own videos from their own libaries of hundreds of movies. Listening to their own songs from their own libraries of hundreds of thousands of songs. Those apps require huge storage, like hundreds or thousands of GB, for a single person. But they therefore don't require high bandwidth transmission. A 5400RPM EIDE drive is plenty fast enough, but it still needs 500GB capacity (which density might require the higher RPM, but not the faster interface, caches, etc). And for consumers, the overhead for IO bandwidth is a waste of money. As is more than maybe 2 or 3 drives for RAID failover, which also demands cheaper drives.
Hitachi's 0.5TB SATA-II drive is targeted at datacenters and multiuser servers, with money for bandwidth. So where are the cheap, huge, Personal Computer drives? Say, 500GB EIDE for $250?
Re:LATENCY LATENCY LATENCY (Score:4, Insightful)
You can always improve your seek time by adding more redundant mirrors. If we apply the formula the formula seen here [img113.echo.cx] where x is the number of redundant mirrors, we can calculate the value of p which will give us our rotational latency for the mean seek time (hence the 0.5 because we want the 50% point for seek times).
Using this you can get 7200rpm drives to easily outseek a 15000rpm drive by using 4 or more redundant sources, and it's still cheaper for the same capacity, AND more failure tolerant.
This is why RAID always wins. Quantity has a quality all its own. SCSI used RAID to defeat the SLED concept in mainfraimes, commodity drives are doing the same to SCSI, by playing with the same rules.
Who Cares? (Score:2, Insightful)
How cool are you going to feel when your 500 GB drive dies?
Re:Do the differences matter for "most people" (Score:3, Insightful)
Now mirror doesn't protect from software/hardware controller malfunction, nor does it protect you from yourself in the case you delete something you needed, but the setup here prevents accidental deletion for the most part, and mirroring guards against drive failure which does happen from time to time, so it's doing its job, and isn't doing anything extra I don't need.
You have to pick the appropriate level of paranoia for what you're doing. To say your backup method is best for everyone is wrong no matter what you say.