Thanks Gordon.
Also I want to know whether 60GB is compatible with this laptop A15
S1292. How can I find that out?

Gordon wrote:
> ramachandran.balu******.com wrote:
>
> > I have a Toshiba A15 S1292 laptop. Its hard disk is 30 GB and model
> > MK3021GAS. I would like to replace the 30GB hard disk with new 60 GB
> > hard disk, as the 30GB hard disk crashed.
> >
> > I am planning to go for Toshiba hard drive model MK6021GAS( 60GB).
>
> Remove the existing HDD and see if it's a standard 2.5" drive. If so thendo
> NOT pay the huge exorbitant rip-off prices of Toshiba (unless the machine
> is still in warranty). You can buy generic 2.5" drives at about a quarter
> of the cost of the Toshiba ones. Example - I have a Tecra 9000 that came
> with a 10GB drive. I enquired about the Toshiba replacement 30GB drive -
> £270 approx (it was a while ago) where a generic Hitachi drive was
> £65!!!!!! Fitting was a matter of four VERY small screws......
>
> HTH

Balu wrote:

> Thanks Gordon.
> Also I want to know whether 60GB is compatible with this laptop A15
> S1292. How can I find that out?
>

As long as the drive fits, it's compatible AFAIK.......

There is almost no way to be absolutely sure other than to try it, but
I'm pretty sure that the A15 is new enough that it has no size limits
below [at least] 137GB. I've had 40 gig drives in a 2805, and that is
YEARS older than an A15.

This is, however, a good time to update the BIOS to the latest available.


Balu wrote:

> Thanks Gordon.
> Also I want to know whether 60GB is compatible with this laptop A15
> S1292. How can I find that out?
>
> Gordon wrote:
>
>>ramachandran.balu******.com wrote:
>>
>>
>>>I have a Toshiba A15 S1292 laptop. Its hard disk is 30 GB and model
>>>MK3021GAS. I would like to replace the 30GB hard disk with new 60 GB
>>>hard disk, as the 30GB hard disk crashed.
>>>
>>>I am planning to go for Toshiba hard drive model MK6021GAS( 60GB).
>>
>>Remove the existing HDD and see if it's a standard 2.5" drive. If so then do
>>NOT pay the huge exorbitant rip-off prices of Toshiba (unless the machine
>>is still in warranty). You can buy generic 2.5" drives at about a quarter
>>of the cost of the Toshiba ones. Example - I have a Tecra 9000 that came
>>with a 10GB drive. I enquired about the Toshiba replacement 30GB drive -
>>£270 approx (it was a while ago) where a generic Hitachi drive was
>>£65!!!!!! Fitting was a matter of four VERY small screws......
>>
>>HTH
>
>

I was comparing the 60GB disk specifications and 30 GB one. There is
one difference with respect to "Data Storage Physical" key feature. It
shows for
60GB -- Number of disks= 2 and Data heads =4 and for
30GB -- Number of disks= 1 and Data heads =2 .

Does the number of disks or data heads have any significance on
upgrading the disk from 30GB to 60GB?



Barry Watzman wrote:
> There is almost no way to be absolutely sure other than to try it, but
> I'm pretty sure that the A15 is new enough that it has no size limits
> below [at least] 137GB. I've had 40 gig drives in a 2805, and that is
> YEARS older than an A15.
>
> This is, however, a good time to update the BIOS to the latest available.
>
>
> Balu wrote:
>
> > Thanks Gordon.
> > Also I want to know whether 60GB is compatible with this laptop A15
> > S1292. How can I find that out?
> >
> > Gordon wrote:
> >
> >>ramachandran.balu******.com wrote:
> >>
> >>
> >>>I have a Toshiba A15 S1292 laptop. Its hard disk is 30 GB and model
> >>>MK3021GAS. I would like to replace the 30GB hard disk with new 60 GB
> >>>hard disk, as the 30GB hard disk crashed.
> >>>
> >>>I am planning to go for Toshiba hard drive model MK6021GAS( 60GB).
> >>
> >>Remove the existing HDD and see if it's a standard 2.5" drive. If so then do
> >>NOT pay the huge exorbitant rip-off prices of Toshiba (unless the machine
> >>is still in warranty). You can buy generic 2.5" drives at about a quarter
> >>of the cost of the Toshiba ones. Example - I have a Tecra 9000 that came
> >>with a 10GB drive. I enquired about the Toshiba replacement 30GB drive -
> >>£270 approx (it was a while ago) where a generic Hitachi drive was
> >>£65!!!!!! Fitting was a matter of four VERY small screws......
> >>
> >>HTH
> >
> >

No

But if you are buying a new drive, just forget what you have and look
for a 5400rpm drive. The only things you need to worry about are
interface (IDE, I am pretty sure) and make sure that the new drive will
fit (thickness).


Balu wrote:

> I was comparing the 60GB disk specifications and 30 GB one. There is
> one difference with respect to "Data Storage Physical" key feature. It
> shows for
> 60GB -- Number of disks= 2 and Data heads =4 and for
> 30GB -- Number of disks= 1 and Data heads =2 .
>
> Does the number of disks or data heads have any significance on
> upgrading the disk from 30GB to 60GB?
>
>
>
> Barry Watzman wrote:
>
>>There is almost no way to be absolutely sure other than to try it, but
>>I'm pretty sure that the A15 is new enough that it has no size limits
>>below [at least] 137GB. I've had 40 gig drives in a 2805, and that is
>>YEARS older than an A15.
>>
>>This is, however, a good time to update the BIOS to the latest available.
>>
>>
>>Balu wrote:
>>
>>
>>>Thanks Gordon.
>>>Also I want to know whether 60GB is compatible with this laptop A15
>>>S1292. How can I find that out?
>>>
>>>Gordon wrote:
>>>
>>>
>>>>ramachandran.balu******.com wrote:
>>>>
>>>>
>>>>
>>>>>I have a Toshiba A15 S1292 laptop. Its hard disk is 30 GB and model
>>>>>MK3021GAS. I would like to replace the 30GB hard disk with new 60 GB
>>>>>hard disk, as the 30GB hard disk crashed.
>>>>>
>>>>>I am planning to go for Toshiba hard drive model MK6021GAS( 60GB).
>>>>
>>>>Remove the existing HDD and see if it's a standard 2.5" drive. If so then do
>>>>NOT pay the huge exorbitant rip-off prices of Toshiba (unless the machine
>>>>is still in warranty). You can buy generic 2.5" drives at about a quarter
>>>>of the cost of the Toshiba ones. Example - I have a Tecra 9000 that came
>>>>with a 10GB drive. I enquired about the Toshiba replacement 30GB drive -
>>>>£270 approx (it was a while ago) where a generic Hitachi drive was
>>>>£65!!!!!! Fitting was a matter of four VERY small screws......
>>>>
>>>>HTH
>>>
>>>
>

On Tue, 17 Oct 2006 16:02:20 -0400, Barry Watzman Has Frothed:

> No
>
> But if you are buying a new drive, just forget what you have and look for
> a 5400rpm drive. The only things you need to worry about are interface
> (IDE, I am pretty sure) and make sure that the new drive will fit
> (thickness).

Seagate Momentus 100 gig @5400rpm. I have two of them, one with linux on
it and one with XP.
--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

In article <1161114019.413115.150480@e3g2000cwe.googlegroups. com>,
Balu <ramachandran.balu******.com> wrote:
>I was comparing the 60GB disk specifications and 30 GB one. There is
>one difference with respect to "Data Storage Physical" key feature. It
>shows for
>60GB -- Number of disks= 2 and Data heads =4 and for
>30GB -- Number of disks= 1 and Data heads =2 .
>
>Does the number of disks or data heads have any significance on
>upgrading the disk from 30GB to 60GB?

The number of disks and data heads is very significant in determining
the storage capacity of the device. This one is 15GB per surface,
thus 30GB for top and bottom of one platter. Two platters makes 60GB.
But nowadays these details are hidden from the user, and the device is
just addressed by Logical Block Number.

Storage capacity per surface increases as disk manufacturers learn how
to increase the data density.

carl
--
carl lowenstein marine physical lab u.c. san diego
clowenst@ucsd.edu

Carl Lowenstein wrote:

> The number of disks and data heads is very significant in determining
> the storage capacity of the device. This one is 15GB per surface,
> thus 30GB for top and bottom of one platter.

Since when are there read heads on both surfaces of a platter?

Ian Singer


--


================================================== =======================
See my homepage at http://www.iansinger.com
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All genealogy is stored in TMG from http://www.whollygenes.com
Charts and searching using TNG from http://www.tngsitebuilding.com
I am near Toronto Canada, can I tell where you are from your reply?
================================================== =======================

"Ian Singer" <iansinger@sympatico.ca> wrote in message
news:4ps1qhFj6jptU1@individual.net
> Carl Lowenstein wrote:
>
>> The number of disks and data heads is very significant in determining
>> the storage capacity of the device. This one is 15GB per surface,
>> thus 30GB for top and bottom of one platter.
>
> Since when are there read heads on both surfaces of a platter?

OMG! Ever since floppies started reading and writing on both sides. Hell
like 20 years ago. Where have you been? ;)

--
Bill

On Fri, 20 Oct 2006 09:38:28 -0400, Ian Singer Has Frothed:

> Carl Lowenstein wrote:
>
>> The number of disks and data heads is very significant in determining
>> the storage capacity of the device. This one is 15GB per surface, thus
>> 30GB for top and bottom of one platter.
>
> Since when are there read heads on both surfaces of a platter?
>
> Ian Singer

Western Digital started doing it way back when they were making 6.4 gig
and other drives with one platter having two surfaces.

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794

Pretty much since hard drives were invented, going back to the 1950's.
They have virtually always used both sides of the platter. In some
older drives, one side of one platter was used for the head servo
information. This is no longer done, as all drives now have "embedded
servo tracks".


Ian Singer wrote:

> Carl Lowenstein wrote:
>
>> The number of disks and data heads is very significant in determining
>> the storage capacity of the device. This one is 15GB per surface,
>> thus 30GB for top and bottom of one platter.
>
>
> Since when are there read heads on both surfaces of a platter?
>
> Ian Singer
>
>

No, WAY before that. Going back to the origin of drives in the 1950's.

BillW50 wrote:

> "Ian Singer" <iansinger@sympatico.ca> wrote in message
> news:4ps1qhFj6jptU1@individual.net
>
>> Carl Lowenstein wrote:
>>
>> Since when are there read heads on both surfaces of a platter?
>
>
> OMG! Ever since floppies started reading and writing on both sides. Hell
> like 20 years ago. Where have you been? ;)
>

No, go way, way back ... I don't think that any drive maker has ever
made a drive that did not have heads on both sides of the platters. The
original Seagate drives had heads on both sides of the platters.

Meat Plow wrote:

> On Fri, 20 Oct 2006 09:38:28 -0400, Ian Singer Has Frothed:
>
>
>>Carl Lowenstein wrote:
>>
>>
>>>The number of disks and data heads is very significant in determining
>>>the storage capacity of the device. This one is 15GB per surface, thus
>>>30GB for top and bottom of one platter.
>>
>>Since when are there read heads on both surfaces of a platter?
>>
>>Ian Singer
>
>
> Western Digital started doing it way back when they were making 6.4 gig
> and other drives with one platter having two surfaces.
>

Ian Singer wrote:
> Carl Lowenstein wrote:
>
>> The number of disks and data heads is very significant in determining
>> the storage capacity of the device. This one is 15GB per surface,
>> thus 30GB for top and bottom of one platter.
>
> Since when are there read heads on both surfaces of a platter?

Well the Shugart SA801 8" floppy drives on my old CPM system, were
single-sided. The SA851 was double sided. This was back in around 1982.

Were there ever any hard drives that did not at least use the second
side for servo control?

On Fri, 20 Oct 2006 12:38:04 -0400, Barry Watzman Has Frothed:

>
> No, go way, way back ... I don't think that any drive maker has ever made
> a drive that did not have heads on both sides of the platters. The
> original Seagate drives had heads on both sides of the platters.


Well the real old IBM, Connor, etc could use one side for servo data but
yes, the modern (Winchester style) drives had double sided platters. I
don't think the original ramac of the mid 50's were DS. That probably
happened in the early 70's when the first Winchesters showed up.

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794