HDD internal terminology

  Muergo 17:43 11 Sep 2009

Further to previous thread, now faced with buying choices for 160 Gb internal Hdd, what's the difference between=

Pata 8Mb
Hdd 7200 IDE
ATA 100

Four different manufacturers all 7,200 rpm 3.5inch

Are they all the same spec??

  Technotiger 17:46 11 Sep 2009

They are all simply IDE hard drives.

  Technotiger 17:48 11 Sep 2009

Or rather - 'they' are simply a IDE Hard Drive!

  Muergo 18:59 11 Sep 2009

Thanks, all clear now, why don't they all call them that

  DieSse 19:32 11 Sep 2009

If we want to be pedantic ;-))

All modern hard drives are IDE (= Integrated Dive Electronics) which means most of the drive controller is on the drive itself.

PATA means a Parallel (Cable) Advanced Technology Attachment - as opposed to SATA which is Serial (Cable) etc.

PATA is useful as it tells you for sure the drive uses the older wide ribbon cable.

UIDE 100 OEM - the U means Universal - it's little used and not particularly helpful.

100 refers to the data transfer rate across the cable (100MBps) and distinguishes it from slower or faster drives. Note that this is NOT the sustained rate from the drive, just the fastest the data passes across the cable.

OEM means the drive is for system builders, not retail - though many are actually sold retail. It implies no box, manual or cables.

ATA 100 - see the above

The only things that guarantee a drive is the older ribbon cable drive is the P for Parallel and the 100MBps rate (because SATA drives have 150 or 300 MBps interfaces). All the other terms are technically ambiguous.

  DieSse 19:34 11 Sep 2009

Dive = Drive of course. O for a totally intelligent checker that knows what you meant as well as what you wrote.


  DieSse 19:54 11 Sep 2009

I forgot the 8MB (note it should be B = Bytes, not b which = bits) part.

This gives you the size of the internal data cache in the drive. Generally a bigger cache improves performance a little. So this is also useful information.

So a totally useful description, with no superfluous bits would be

HDD 160GB PATA100 8MBcache 7200rpm OEM.

Which tells you everything you need to know in the simplest terms.

  Stuartli 20:03 11 Sep 2009

To add a bit more information, Scan details the differences at:

click here

  Muergo 23:17 11 Sep 2009

With anEide to SATA conversion adapter can I fit a Sata drive next to an ATA drive, will they work together.
Alternatively can I replace the EIDE/ATA with a SATA drive using the same system board?

  DieSse 23:48 11 Sep 2009

What is your main board? Does it have any SATA connectors?

There's no real advantage on switching to SATA drives unless you're planning a somewhat larger general update anyway IMO.

  Technotiger 08:06 12 Sep 2009

More details, with pics ...

click here

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