Posted on 04/20/2008 9:13:39 AM PDT by Ernest_at_the_Beach
THANKS.
Much appreciate your knowledgeable answer.
Have pondered that for 20 years.
Nice to lay it to rest finally! LOL.
If you remember these, you’re old:
a) g c800:5
b) 820, 6, 17, 820, 65535
For bonus points, name the manufacturer and a product name of A & B (there were far more than just one)!
Mark
BTW, I’m not old, I’m ancient, practically prehistoric!
Guess I’m not old enough....But I am forced to draw down my IRA’s.
WD(R) Announces WD VelociRaptor(TM) - The World's Fastest SATA Hard Drive
Next-generation 10,000 RPM, 2.5-inch, 300 GB SATA Hard Drive,...but in a 3.5" Form Factor....not a notebook drive.
I don’t know if this will help but IBM 3380 DASD used multiple platers and arms. Each arm had 2 heads one for the top and one for the bottom of each platter. The heads “flew” above the surface. The air system had to come up before the platters were allowed to spin.
Admittedly they were not 3.5 “ platters and they were not trying to”seek” a TB of date in nanoseconds. I would suspect inertia, mass, etc. would be a challenge in the speeds and capacity of todays small drives.
That’s quite logical to this layman.
Thx.
a: Low level format. Seagate was one and so was Western digital. I might even still have one laying around.
b: I want to say an ST-251-1 but the cylinders seem wrong...
17 sectors, MFM?
Maybe one of those old Miniscribe bricks that went out?
Miniscribe bricks:
http://en.wikipedia.org/wiki/MiniScribe
I wonder how fast the masonry was for access?
Actually, it's been too long... Was it G c800:5, or g=c800:5? Either way, that was the debug code to fire up the ROM based disk formatting utility on the Seagate and Western Digital 8 and 16 bit MFM controllers. IIRC, the WD-1007 ESDI controllers used the same address, however, the WD-1006V RLL controllers used CC00:5.
And yes, the drive geometry for the Seagate 40 megabyte MFM drive (the Seagate ST-251. The difference between the 251-0 and 251-1 was 65ms vs 40ms access time - or was it 40 and 28ms? Either way, it no longer matters when a cheap video card has more than 3 times the RAM than these old hard drives, once considered by many to be more than you'd ever need on a server!). 820 cylinders, 6 heads, 17 sectors/track.
Another one I have memorized is the 40MB Mitsubishi MR535. 977x5x17, though it WAS certified to run as a 65MB RLL drive. And WOW! Did they run HOT!!!!!
Mark
Hitachi?
As long as yer breathin’, yer not too old!
(I told on myself, didn’t I?) LOL
I don’t know...There seems to be a lot of players...don’t think all of them are going to make it.
btw...and this is just a guess but I'll bet HDD is not Hillary Deficit Disorder?
a) No clue (not that uncommon)
b) Head/cyl/sect for a Seagate ST251
Amazing the things we learn on FR !!
You probably have something still running with an ST-225, hooked up to a WD RLL controller to get another 10MB out of it.
Are those new drives or drives that have been returned to Fry’s a dozen times?
: )
I can't seem to find the number ST310005N1A1AS-RK on the Seagate Website,...that number is the Seagate suppliedsticker with the serail number....
The Fry sticker has ST31000340AS...which is on the Web Site....
Seagate is probably just trying to get its warehouse cleaned out a bit .
The 500 Gig drive on the shelf had a sticker of 189$....
LOL....HDD is Lingo for Hard Disk Drive...which replaced DASD which stood for Direct Access Storage Device....
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