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Raid seperate platters?

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Sworkhard

Member
Joined
Jan 8, 2002
I've Just been thinking that since many hard drives have several platters in them, why could the hardrive manufacturers improve perfomance by creating independant read heads for each one and then use a raid like system to combine these platters into on harddisk. It would lower the seek times and increase read/write speeds.
 

Diggrr

Underwater Senior Member
Joined
Nov 29, 2001
To do so would require all of the hardware needed to run two drives, only inside one case. Two seperate controllers, two voice coil assemblies etc.. The only thing the two drives could share would be the drive motor, which would have to be bigger too.
After all this, you would still need room to put either a raid controller on the drive with a whole new type of ribbon cable (doubling the bandwidth, right?) or to put double ribbon cables to the drive with the raid on the mobo.

Sounds really nice on the surface, but I'd rather stick with what's out there now, than make a new drive device that solves no problems and costs more to make, and is probably harder to cool.

Keep thinking though, necessity is the Mother of all invention.
 

PsycoPhreak

Member
Joined
Dec 13, 2001
Actually, thats what they are doing already, to achieve the muti gigabyte drives available today, the controllers function in the same principle as RAID does, by separating the platters. It's not exactly the same technique, but close.

I know this to be true with maxtor drives, as I had an in depth chat with a tech when I had bought my original 30 gig drives and set them up on a raid card, the performance was horrid, with data corruption everywhere, and in looking to find a way to fix the issue, found a very informative tech working at maxtor, who, explained to me that the newer larger mutigig drives use a similar technique, and that the performance was an issue with the firmware of the drives I had themselves, he then authorized a return of both my drives for 2 new ones with an updated firmware. His explaination was fairly simple..."the new technology we use in our drives is fairly similar to a raid 0 stripe, in a 2 platter drive, the controller is split into 2 channels, one for each platter, which allows us to increase the storage capacity, when you connect these drives to a RAID controller card, in effect, you mounting an array on top of an array, and unfortunately, we have seen some compatability issues arise with certain raid controllers. this problem has been fixed with a new drive firmware, again, unfortunately, the only way to have this newer firmware is to RMA your drives" I quoted him to the best of my memory

I said no problem, since getting the new drives ( and I've had them for quite a while now ), I never had a problem.