Gone mad

Soldato
Joined
18 Oct 2002
Posts
7,885
Used to be a a huge fan of quick hard disks so always had a raid 0 array of ibm/hitachi disks. About 2 years ago got sick of the hastle and went back to a single drive and saw no real performance differance.

Now i have gone and bought a scsi raid card and some 15k scsi drives :confused: Muppet. SCSI card is pci so i probably won't see any differance anyway :(
 
a single 15k drive is enough to saturate the bandwidth of standard PCI. at least you'll get some decent seek times ;)
 
helmutcheese said:
They cards are suited to mobos like some Asus server models that have a 66mhz PCI Slot instead of 33mhz.


yes and no, pci is still low latency so faster access from a quicker drive is still noticable, and 133mb/s isn't much to be laughed at, i think about the only combo that can need more than that is a 1tb hitachi raid 0 setup which benchies at around 140mb/s sustained transfer.

but in general the expense of scsi is completely unwarranted, the noise and heat also are not worth the small increases.

home users in general do not have 10's/100's/1000's of users all trying to access lots and lots of small files quickly, theres a very good reason servers have smaller capacity very very high rpm drives where noise doesn't matter. because its often suited for the purpose of multiple small file reads. at home, cpu's and gpu's aren't really limited by hard drives, you load up a game, it takes 10 seconds or 30 seconds to load the info for a level, but once thats done the hard drive isn't really involved, enough mem and a decent gpu is required. a decent raid 0 , 2/4/8 drives will almost always be faster and cheaper than alternative setups for home users where sustained transfer is in general the only thing to worry about.

the new samsung drives are, if not wrong, going to have insane platter density, which will mean all things being equal it will give insane sustained transfer and could well be the king of all drives to get for a while.

afaik hard drives are setup to only read from one platter at a time, which seems an obvious area for improvement. if you've got 2 to 5 platters and you can read from more than one at a time surely that would improve throughput hugely, or essentially raid 0 within the drive, spread the data across the platters and raid one file from 3 platters.
 
matja said:
a single 15k drive is enough to saturate the bandwidth of standard PCI. at least you'll get some decent seek times ;)

Well, not quite although its close afaik and nearly a moot point... most 15k rpm drives push around 98MB/sec peak. (e.g. Maxtor Atlas 15K II 15,000rpm) The PCI bus has a theoretical limit of about 133MB/sec and most actual implementations push anything from at least 110MB/sec upwards, usually 120MB/sec+ IME (depending on chipset, actual clock rate, controllers and so on.) Or do you know of a single 15k rpm disk that will push in excess of 110/120MB sec or so?
 
sanaxe1 said:
Can you tell much difference with 15k over 7.1k in games and the like?

I find that I have first choice of the vehicles in Battlefield 2 when the first round starts after a map change ;) (4 x 15k in raid-0)
 
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