SATA Drive is very slow Tags: Hard Drives Sata CPUs Storage Last response: February 20, 2006 7:35 PM in Storage Share SuperStruct February 20, 2006 7:07:27 PM I have 2 hard drives that are the same exact brand and size (Seagate SATA 250GB ). One of them is being VERY slow. I ran HD Tach on both drives and I received the following results: ---Normal Drive--- Random Acces: 15.6ms CPU Utilization: 4% Average Read: 56.1 MB/s ---Slow drive--- Random Acces: 15.2ms CPU Utilization: 100% Average Read: 3.7 MB/s When I am transferring files to/from this drive, my computer slows down almost to the point of being completely frozen (I can't even see the mouse because the CPU is being used from the drive I/O!) Here's my question: Is this a problem with the hard drive, the serial cable, or the motherboard? How can I troubleshoot this problem? More about : sata drive slow | E-mail me updates | Report abuse Register or log in to remove Codesmith February 20, 2006 7:35:09 PM Check to see what DMA transfer mode is being used. It could be using PIO mode which is very slow. You can manaully lower the speed, but excessive comunication errors will also automatically downgrade a device. My external SATA enclosure uses an extra long SATA cable and often it gets kicked down to PIO mode. Swap ports and cables with the fast drive, then run a full diagnostic on the drive. Use Seagates Online Tools. Also check the smart status. Obviously if the test indicate problems you RMA the drive. If the drive is slow but passes the test, you should talk to Seagates technical support before RMA's the drive. Always fully test all new drives. Never assume they work. You never know how many times the box was dropped before reaching your door or the store shelf. | Report abuse Ask the community Publish Tom's Hardware>Forum>Storage>SATA Drive is very slow> Related ressources: Forum6gb sata drive very slow ForumVery Slow 320Gb SATA 300 drive ForumVery slow SATA . ForumSamsung / TSST drive very slow and freezes ForumNew Seagate 3TB internal hard drive running very slow - help? ForumAsus A8V-E DELUXE - SATA 1 connector runs very slow . ForumMacbook Pro running very very slow ... Hard Drive problem? ForumNew drive very , very slow ForumSystem very slow after hard drive change ForumSecond Sata very Slow ForumSecond hard drive very slow ForumInstalled a third hard drive and computer is now very slow ForumVery slow boot times after adding hard disc to system with SSD boot dr Forum[SOLVED] Samsung 840 Pro-- very slow in new build. Why? ForumFirst SSD advice? ForumWindows doesn't display correct RAID hard drive space ForumHow do you change drive letters? ForumStrange hard drive performance Forumi have no sata drive on my kt600 ForumUnallocated Drive? More resources Read discussions in other Storage categories Hard Drives DVD Drives DVD Writers Optical Media Flash Media NAS/RAID SSD Western Digital !