Guest churin Posted September 15, 2008 Posted September 15, 2008 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 Posted September 15, 2008 Posted September 15, 2008 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 Posted September 15, 2008 Posted September 15, 2008 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 Posted September 16, 2008 Posted September 16, 2008 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. -- http://www.bootdisk.com/
Guest AlmostBob Posted September 16, 2008 Posted September 16, 2008 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 -- Adaware http://www.lavasoft.de spybot http://www.safer-networking.org AVG free antivirus http://www.grisoft.com Etrust/Vet/CA.online Antivirus scan http://www3.ca.com/securityadvisor/virusinfo/scan.aspx Panda online AntiVirus scan http://www.pandasoftware.com/ActiveScan/ Catalog of removal tools (1) http://www.pandasoftware.com/download/utilities/ Catalog of removal tools (2) http://www3.ca.com/securityadvisor/newsinfo/collateral.aspx?CID=40387 Blocking Unwanted Parasites with a Hosts file http://mvps.org/winhelp2002/hosts.htm links provided as a courtesy, read all instructions on the pages before use Grateful thanks to the authors and webmasters _ "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 Posted September 16, 2008 Posted September 16, 2008 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 Posted September 16, 2008 Posted September 16, 2008 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? >
Recommended Posts