Slow Uncached Speed

jigglylizard · 05-31-2006, 07:27 PM

Hello,
I ran a full system test at http://www.pcpitstop.com/
The results were fine except for BOTH my hard drives. Their uncached were very low, 18 and 15 mb/s respectively for Samsung SV3063H and Western Digital WD600BB-00CXA0 (These are the names in my device manager).
Compared to other systems with similar processor and clock speed, they were at 47% and 39% speed respectively.

I'm not quite sure what they mean by this. Their definition:
"Cached and uncached speed is measured in megabytes per second (MB/s). When a percentage is shown for cached and uncached speed, it compares the performance of the drive with those of systems in our database with the same processor and clock speed. (Our database currently has 2198 similar systems.) A rating of 200% means a disk is twice the performance of similar systems, 50% means it's half the performance. Cached disk speed generally measures the efficiency of the system's processor and memory system, not the performance of the hard disk. Uncached speed is most affected by the physical hard disk and the disk interface. "

Is something wrong with my drives that coudl slow down my system? If so what is it and how can the problem be resolved?

jigglylizard · 06-02-2006, 08:32 PM

*Bump*

No one has any idea? Am I unclear? I can elaborate

älek · 01-27-2008, 09:53 PM

Hello!
I've got the same problem. To copy a 700 MB file from one location to another it takes about ten minutes and the music playback is snatchy.
I run the test and the results were:

Description Drive C Drive D
Partition format NTFS NTFS
Cluster size 4 KB 4 KB
Drive label No Label E
Size 131061 MB 78152 MB
Free space 12115 MB (9%) 12996 MB (17%)
Junk files 62 MB (0%) 0 MB (0%)
System Restore Space 15727 MB (12%) 9378 MB (12%)
Data fragmentation Not tested Not tested
File fragmentation Not tested Not tested
Uncached speed 3 MB/s (6%) 33 MB/s (70%)

Seems OK for the D drive, but my C drive is obviously having problems. Can I fix this problem without buying a new drive or formating it?

Thanks in advance,

Kristjan

**Cromewell** · 01-27-2008, 10:04 PM

In device manager expand IDE ATA/ATAPI controllers. Then right click on Primary channel and pick properties then click on advanced settings and set transfer mode to DMA if available for device 1 and device 2. Repeat for all channels.

SirKenin · 01-28-2008, 01:05 AM

Geez. Neither one of those drives are any good. They're both dogs. I don't quite know what you're expecting from them. Try upgrading the drives. The Samsung is a 5400 RPM drive. The Caviar is an all around piece of junk. Try picking up some new drives. Also, you might want to defrag the ones you have if you have to keep them.

**Cromewell** · 01-28-2008, 02:15 AM

I don't think the OP is coming back, this is an old thread from 2006 but even if they do come back a 5400RPM drive should get more than 20MB/sec. Not that I don't agree that new drives are in order

SirKenin · 01-28-2008, 02:28 AM

Lol. I didn't even notice the date. I think we'll rename Alek "Jesus" because of his ability to raise things from the dead. hehe.

älek · 01-28-2008, 04:55 AM

Quote:

Originally Posted by Cromewell

In device manager expand IDE ATA/ATAPI controllers. Then right click on Primary channel and pick properties then click on advanced settings and set transfer mode to DMA if available for device 1 and device 2. Repeat for all channels.

Thanks - I forgot to write about it, but DMA modes are already set for all channels.

älek · 01-29-2008, 09:35 PM

I ran error-checking for drive C and the results said:
"File record segment xxxxx is unreadable"
Does it mean that my HD is going bad?

05-31-2006, 07:27 PM	#1 (permalink)
jigglylizard New Member Join Date: May 2006 Posts: 8	Slow Uncached Speed Hello, I ran a full system test at http://www.pcpitstop.com/ The results were fine except for BOTH my hard drives. Their uncached were very low, 18 and 15 mb/s respectively for Samsung SV3063H and Western Digital WD600BB-00CXA0 (These are the names in my device manager). Compared to other systems with similar processor and clock speed, they were at 47% and 39% speed respectively. I'm not quite sure what they mean by this. Their definition: "Cached and uncached speed is measured in megabytes per second (MB/s). When a percentage is shown for cached and uncached speed, it compares the performance of the drive with those of systems in our database with the same processor and clock speed. (Our database currently has 2198 similar systems.) A rating of 200% means a disk is twice the performance of similar systems, 50% means it's half the performance. Cached disk speed generally measures the efficiency of the system's processor and memory system, not the performance of the hard disk. Uncached speed is most affected by the physical hard disk and the disk interface. " Is something wrong with my drives that coudl slow down my system? If so what is it and how can the problem be resolved?

01-27-2008, 10:04 PM	#4 (permalink)
Cromewell Moderator Join Date: Dec 2004 Location: Canada Age: 24 Posts: 9,790	In device manager expand IDE ATA/ATAPI controllers. Then right click on Primary channel and pick properties then click on advanced settings and set transfer mode to DMA if available for device 1 and device 2. Repeat for all channels. __________________ Then, when you have found the shrubbery, you must cut down the mightiest tree in the forest with a herring!! Tiax rules all! Know this and be judged. I must plug a couple comics because they are good :D: www.ctrlaltdel-online.com www.userfriendly.org

01-28-2008, 01:05 AM	#5 (permalink)
SirKenin Diamond Member Join Date: Aug 2006 Location: In a box, under a bridge...With EVDO internet. Age: 37 Posts: 4,614	Geez. Neither one of those drives are any good. They're both dogs. I don't quite know what you're expecting from them. Try upgrading the drives. The Samsung is a 5400 RPM drive. The Caviar is an all around piece of junk. Try picking up some new drives. Also, you might want to defrag the ones you have if you have to keep them. __________________ cpu: Intel E8400/Asus Silent Knight AL mobo: Asus Striker Extreme Case/PSU: Antec 900/Antec TruPower Quattro 1000W RAM: 4GB OCZ Gold GX XTC DDR2-800 VGA: 8800GTX 768 MB, Asus PhysX Sound: SB X-Fi Fatal1ty DVD: 2 x Pioneer SATA DVD/RW HDD: WD RaptorX 150GB, Raptor 74GB, Seagate 750GB Monitor: 37" Sharp Aquos 1080p Do you really care? I didn't think so.

01-28-2008, 02:15 AM	#6 (permalink)
Cromewell Moderator Join Date: Dec 2004 Location: Canada Age: 24 Posts: 9,790	I don't think the OP is coming back, this is an old thread from 2006 but even if they do come back a 5400RPM drive should get more than 20MB/sec. Not that I don't agree that new drives are in order __________________ Then, when you have found the shrubbery, you must cut down the mightiest tree in the forest with a herring!! Tiax rules all! Know this and be judged. I must plug a couple comics because they are good :D: www.ctrlaltdel-online.com www.userfriendly.org

01-28-2008, 02:28 AM	#7 (permalink)
SirKenin Diamond Member Join Date: Aug 2006 Location: In a box, under a bridge...With EVDO internet. Age: 37 Posts: 4,614	Lol. I didn't even notice the date. I think we'll rename Alek "Jesus" because of his ability to raise things from the dead. hehe. __________________ cpu: Intel E8400/Asus Silent Knight AL mobo: Asus Striker Extreme Case/PSU: Antec 900/Antec TruPower Quattro 1000W RAM: 4GB OCZ Gold GX XTC DDR2-800 VGA: 8800GTX 768 MB, Asus PhysX Sound: SB X-Fi Fatal1ty DVD: 2 x Pioneer SATA DVD/RW HDD: WD RaptorX 150GB, Raptor 74GB, Seagate 750GB Monitor: 37" Sharp Aquos 1080p Do you really care? I didn't think so.

06-02-2006, 08:32 PM	#2 (permalink)
jigglylizard New Member Join Date: May 2006 Posts: 8	Bump No one has any idea? Am I unclear? I can elaborate

01-27-2008, 09:53 PM	#3 (permalink)
älek New Member Join Date: Apr 2006 Posts: 20	Hello! I've got the same problem. To copy a 700 MB file from one location to another it takes about ten minutes and the music playback is snatchy. I run the test and the results were: Description Drive C Drive D Partition format NTFS NTFS Cluster size 4 KB 4 KB Drive label No Label E Size 131061 MB 78152 MB Free space 12115 MB (9%) 12996 MB (17%) Junk files 62 MB (0%) 0 MB (0%) System Restore Space 15727 MB (12%) 9378 MB (12%) Data fragmentation Not tested Not tested File fragmentation Not tested Not tested Uncached speed 3 MB/s (6%) 33 MB/s (70%) Seems OK for the D drive, but my C drive is obviously having problems. Can I fix this problem without buying a new drive or formating it? Thanks in advance, Kristjan

01-29-2008, 09:35 PM	#9 (permalink)
älek New Member Join Date: Apr 2006 Posts: 20	I ran error-checking for drive C and the results said: "File record segment xxxxx is unreadable" Does it mean that my HD is going bad?

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