- Sep 21, 2001
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Hi everyone. My system suddenly started feeling strangely and inconsistently slow, and I found the culprit. The system drive write speed is way lower than normal. What I mean as way lower is something like 20x slower.... 
For some reason, the drive is capped at aprox 4 MB/sec write Strangely, read speed are still normal (~90 MB/sec) Yes, I know write speed are usually slower than read speeds, but from 90 Mb/sec read to a 4 MB/sec write, something is obviously wrong.
At first I thought something was botched with my windows install, so I decided to to restore a previous Ghost image. Problem is, even Ghost 2003 under DOS is still writing at only 200 MB/min. That obviously discards the botched windows idea, as even in the BIOS it is still very slow to write.
Some background
Disk is a 1TB HGST Deskstar 7K1000.B, CPU is an AMD Phenom II X4 BE 955, motherboard is a Gigabyte GA-MA790X-UD4P (Bios F8). This drive has WinXP Pro SP3 on it. I also have a Samsung Spinpoint F3 HS502HJ 500GB as second OS drive with windows 7 AMD64 ultimate. Writing to the Samsung is still normal, as I can copy a full DVD ISO from the 7K1000.B to the F3 in less than a minute. However, writing to the 7K1000.B is slow (4 MB/sec) no matter if I boot in XP, windows 7 or DOS
The only change I made to the system was a case upgrade. The new case is a CoolerMaster gladiator 600, toolless and bottom mounted PSU. I also changed my 2 SATA ODD from the SB750 SATA ports to the gigabyte JMB36x additional 2 ports. At first, I was blaming the slow down to the JMicron controller, but after changing the ODD back to the SB750 it remains the same. I have even disabled the JMicron ports in the BIOS, and still nothing. I haven't tried the drive in a different machine, but I don't think it should matter
Any suggestion? As you can see, 90 MB/sec read with a 4 MB/sec write is NOT a normal situation of "write slower than read is normal....." Not by that much of a discrepancy.
Thanks
For some reason, the drive is capped at aprox 4 MB/sec write Strangely, read speed are still normal (~90 MB/sec) Yes, I know write speed are usually slower than read speeds, but from 90 Mb/sec read to a 4 MB/sec write, something is obviously wrong.
At first I thought something was botched with my windows install, so I decided to to restore a previous Ghost image. Problem is, even Ghost 2003 under DOS is still writing at only 200 MB/min. That obviously discards the botched windows idea, as even in the BIOS it is still very slow to write.
Some background
Disk is a 1TB HGST Deskstar 7K1000.B, CPU is an AMD Phenom II X4 BE 955, motherboard is a Gigabyte GA-MA790X-UD4P (Bios F8). This drive has WinXP Pro SP3 on it. I also have a Samsung Spinpoint F3 HS502HJ 500GB as second OS drive with windows 7 AMD64 ultimate. Writing to the Samsung is still normal, as I can copy a full DVD ISO from the 7K1000.B to the F3 in less than a minute. However, writing to the 7K1000.B is slow (4 MB/sec) no matter if I boot in XP, windows 7 or DOS
The only change I made to the system was a case upgrade. The new case is a CoolerMaster gladiator 600, toolless and bottom mounted PSU. I also changed my 2 SATA ODD from the SB750 SATA ports to the gigabyte JMB36x additional 2 ports. At first, I was blaming the slow down to the JMicron controller, but after changing the ODD back to the SB750 it remains the same. I have even disabled the JMicron ports in the BIOS, and still nothing. I haven't tried the drive in a different machine, but I don't think it should matter
Any suggestion? As you can see, 90 MB/sec read with a 4 MB/sec write is NOT a normal situation of "write slower than read is normal....." Not by that much of a discrepancy.
Thanks
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