Maxtor Diamond 21 PATA 250 Hard Drive STM3250820A

Turn the computer off.
Turn the computer on, and press <DEL> to enter BIOS SETUP.
Ensure that the hard-drive is "enabled", and set to 'AHCI'.
Save the BIOS settings.
Reboot, and install Windows.

what problem, it is not shinny any more? LOL?
do say. please.
I am clueless, so far due to?
what system? PC, MAC,DVR,ext, TV, moon rocket.(LOL)
what OS?
using it as an internal drive, 2nd drive, or external.?
boot drive?


Seagate bought out MAXTOR.
that number must be a bar code, its not the product number
eg:
so tell me what it is.
as time passes, maxtor, fades to dark at SeaGate.
but this deep search nets, this, (hidden well)
http://www.seagate.com/gb/en/search/?keyword=maxtor

ive been using MAXTOR since day 1.

decodes for Maxtor :

Maxtor
xayb0

xa = drive family
- 6Y = DiamondMax(DM) Plus 9
- 6B = DM10
- 6L = DM10 RoHS compliant version
- 6H = DM11
- 7B = MaxLine(ML)III
- 7L = MLIII RoHS compliant
- 7H = ML Pro
- 4R = DM16
- 2F = Fireball 3
- 6E = DM Plus 8
- 5A = ML II
- 7Y = ML Plus II
y = the capacity of the disk, in gigabytes. Drives less than 100GB will have a leading zero (80GB is denoted as 080, etc)
b = buffer size and interface
- J = 2MB PATA with ball-bearing motor
- L = 2MB PATA with fluid dynamic bearing (FDB) motor
- P = 8MB PATA
- R = 16MB PATA
- M = 8MB SATA
- S = 16MB SATA
- F = 16MB SATA 3gbps
All Maxtor SKUs have a zero at the end. It may have a value, but I'm not aware of one.

Example: A Maxtor drive with a model number of 6Y200P0 is a 200GB 7200RPM PATA drive with an 8MB buffer from the DiamondMax Plus 9 family.

now my generic answer: for all HDD. A+ training....(instructor)
1: i make sure it has +5v and 12vdc power, if not all is hopeless.
2: IF PATA/SATA , i listen to the drive case with my ear.
whirrrrrrrrrrrrrr, no whirrrrrrr ,? its DOA.
if it spins its good. if not its 100% DEAD, (RIP)
3: do the gyro test, (if it fights you, as you change it's direction, then it is spinning) Drive in HAND. (whole deal)
4: does BIOS see it? (MOBO BIOS) hot key hit. RTM on MOBO.
yes, good.
no , DEAD. try another power cord to drive or data cable.
try different data ports. on MOBO.
5: try it on 1 PC, with step 4 and 5
6: if BIOS sees it ,so should WINDOWS. (may)
in the device manager.
and in disk manager. (off computer management CPL)
both. set the drive latter in the latter or it will be hidden.

keep in mind BIOS never tests a drive. it only asks it for
its NAME (PNP) PNP just identiifes the maker and type drive. and its spec. and 1 more tests. it shows the drive is NOT BUSY.
these facts ,help all techs, make good trouble shooting.

Take a look at this pdf:
eshop.macsales.com/Tech/manuals/idehdsettings/Maxtor72.pdf

So If this is layout " : : : . : "

then...

slave ----------- " : : : . : "

master -------- " [:]: : . : "

cable select -- " :[:]: . : "

The latest drivers and support would be available from the Seagate website. The Seatools utility is an excellent tool that is also available.
http://www.seagate.com/www/en-us/

I hope this helps.

I am unsure if you are trying to take a currently external drive and mount it internally, or if you are trying to make an internal drive into an external. Please clarify.

If you mean remove your old 80 gb drive and replacing with the Maxtor 500 gb drive you should be able to. The Maxtor 21 series is equiped with SATA. Just make sure that your computer can run SATA. If not, I believe that there are adapters out there.

My Maxtor died like this. The disk was OK, it was the electronics that blew. I bought a new empty disk drive box and fitted the disk drive and fixed it. Years later the disk still works in the replacement box and power supply. I got my files and data back with the disk drive in the new box. The size of that disk looks small today. It may be Parallel (PATA) and you need a PATA box, that is harder to find as obsolete. You need to try the disk first in another drive holder.

So PATA and SATA??? Look here and read up about it with pictures too:
https://askleo.com/whats_the_difference_between_sata_and_pata_and_ide/


An external disk unit has three main parts.
1. The disk drive.
2. The electronics box.
3. The power supply.

problem solved .didn't know i had to press f2 as soon as bios appears to enter setup.also used bootable disk to load windows.
thanks any way.

external USB hard drives do not need to be jumpered, if your computer does not recognize the ext. drive probably it is because the enclosure is defective, when you connect the USB cable you should get the "ding-dong" connection sound.

If you think that your computer recognizes the hard drive then jumper it as "secondary" or "cable select" and install it INTERNALLY, then transfer your data, that will prove that there's a problem with the ext. enclosure.

One more thing, maybe the USB port you use is malfunctioning, try one that you know that works (assuming that you have other USB devices that work).

If you only have a single hard drive (or multiple hard drives for that matter), you should leave the jumper setting as "Cable Select" or CS.

See if this PDF matches your hard drive:
http://www.seagate.com/staticfiles/maxtor/en_us/documentation/quick_specs/dm10_ata_quickspecs.pdf