File transfer speed - Partition to partition

[Guest churin]

I measured time to transfer 1048MB file between partitions in a same

physical drive. It took about 6.66 seconds. The physical dirve is

SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

years old. Is this speed normal?

[Guest smlunatick]

Re: File transfer speed - Partition to partition

 

On Sep 15, 6:43 pm, churin <chu...@new.postalias> wrote:

> I measured time to transfer 1048MB file between partitions in a same

> physical drive. It took about 6.66 seconds. The physical dirve is

> SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

> years old. Is this speed normal?

 

I have not timed any transfers between partitions but with the

knowledge that the two partitions are on the same drive, I would

consider that this is the normal speeds. You must know that most hard

drives have only one set of read/write heads. Since both partitions

are on the same drive, the head must move between partitions and

change between read / write modes. There will always be be some

delay when moving the head and changing modes.

[Guest churin]

Re: File transfer speed - Partition to partition

 

smlunatick wrote:

> On Sep 15, 6:43 pm, churin <chu...@new.postalias> wrote:

>> I measured time to transfer 1048MB file between partitions in a same

>> physical drive. It took about 6.66 seconds. The physical dirve is

>> SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

>> years old. Is this speed normal?

>

> I have not timed any transfers between partitions but with the

> knowledge that the two partitions are on the same drive, I would

> consider that this is the normal speeds. You must know that most hard

> drives have only one set of read/write heads. Since both partitions

> are on the same drive, the head must move between partitions and

> change between read / write modes. There will always be be some

> delay when moving the head and changing modes.

Thanks for your response.

I have just come to realize that the measured time was incorrectly

stated in my OP. It was 18.55 seconds instead of 6.66 seconds.

This makes about 56.5 MBype/s. This is lot less than maximum speed of

150 MBype/s SATA-150 allows. Is this because of the reason you described?

[Guest Plato]

Re: File transfer speed - Partition to partition

 

churin wrote:

>

> I measured time to transfer 1048MB file between partitions in a same

> physical drive. It took about 6.66 seconds. The physical dirve is

> SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

> years old. Is this speed normal?

 

Every PC is different.

 

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[Guest AlmostBob]

Re: File transfer speed - Partition to partition

 

56.5mb read Plus

56.5mb written Plus

thrash time moving the heads around, what more do you want

drive speeds are like car fuel, manufacturers report has nothing to do with

reality

 

 

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"churin" <churin@new.postalias> wrote in message

news:ePAxGt3FJHA.1460@TK2MSFTNGP03.phx.gbl...

> smlunatick wrote:

>> On Sep 15, 6:43 pm, churin <chu...@new.postalias> wrote:

>>> I measured time to transfer 1048MB file between partitions in a same

>>> physical drive. It took about 6.66 seconds. The physical dirve is

>>> SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

>>> years old. Is this speed normal?

>>

>> I have not timed any transfers between partitions but with the

>> knowledge that the two partitions are on the same drive, I would

>> consider that this is the normal speeds. You must know that most hard

>> drives have only one set of read/write heads. Since both partitions

>> are on the same drive, the head must move between partitions and

>> change between read / write modes. There will always be be some

>> delay when moving the head and changing modes.

> Thanks for your response.

> I have just come to realize that the measured time was incorrectly stated

> in my OP. It was 18.55 seconds instead of 6.66 seconds.

> This makes about 56.5 MBype/s. This is lot less than maximum speed of 150

> MBype/s SATA-150 allows. Is this because of the reason you described?

>

[Guest M.I.5¾]

Re: File transfer speed - Partition to partition

 

 

"churin" <churin@new.postalias> wrote in message

news:ePAxGt3FJHA.1460@TK2MSFTNGP03.phx.gbl...

> smlunatick wrote:

>> On Sep 15, 6:43 pm, churin <chu...@new.postalias> wrote:

>>> I measured time to transfer 1048MB file between partitions in a same

>>> physical drive. It took about 6.66 seconds. The physical dirve is

>>> SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

>>> years old. Is this speed normal?

>>

>> I have not timed any transfers between partitions but with the

>> knowledge that the two partitions are on the same drive, I would

>> consider that this is the normal speeds. You must know that most hard

>> drives have only one set of read/write heads. Since both partitions

>> are on the same drive, the head must move between partitions and

>> change between read / write modes. There will always be be some

>> delay when moving the head and changing modes.

> Thanks for your response.

> I have just come to realize that the measured time was incorrectly stated

> in my OP. It was 18.55 seconds instead of 6.66 seconds.

> This makes about 56.5 MBype/s. This is lot less than maximum speed of 150

> MBype/s SATA-150 allows. Is this because of the reason you described?

>

 

150 Mbytes/sec is the maximum sustained burst data rate over the SATA bus.

The speed is indeed slowed by the drive having to shift the read/write heads

around, and by having to wait for the target sector to come around one it

has done so (plus several other factors that are unlikely to become clear in

this post).

[Guest Unknown]

Re: File transfer speed - Partition to partition

 

Took far too long. Even 6.66 seconds is far too long.

"churin" <churin@new.postalias> wrote in message

news:ePAxGt3FJHA.1460@TK2MSFTNGP03.phx.gbl...

> smlunatick wrote:

>> On Sep 15, 6:43 pm, churin <chu...@new.postalias> wrote:

>>> I measured time to transfer 1048MB file between partitions in a same

>>> physical drive. It took about 6.66 seconds. The physical dirve is

>>> SATA-150 and CPUs are Opteron 244x2(1.8GHz). The machine is about 4

>>> years old. Is this speed normal?

>>

>> I have not timed any transfers between partitions but with the

>> knowledge that the two partitions are on the same drive, I would

>> consider that this is the normal speeds. You must know that most hard

>> drives have only one set of read/write heads. Since both partitions

>> are on the same drive, the head must move between partitions and

>> change between read / write modes. There will always be be some

>> delay when moving the head and changing modes.

> Thanks for your response.

> I have just come to realize that the measured time was incorrectly stated

> in my OP. It was 18.55 seconds instead of 6.66 seconds.

> This makes about 56.5 MBype/s. This is lot less than maximum speed of 150

> MBype/s SATA-150 allows. Is this because of the reason you described?

>