Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-18 Thread Yuri
Wojciech Puchar wrote: I am seeing 85MB/s as a speed of a single Hitachi 1TB HD. How high can you go by mirroring or striping 2, 3, 4 harddrives? mirroring - the same, just with 2 processes reading both can get the bandwidth. make sure you use -s high enough (like 1048576) doing gmirror

Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-18 Thread Glen Barber
Hi, Yuri On Mon, May 18, 2009 at 4:29 PM, Yuri y...@rawbw.com wrote: So if I will put 6 hard drives with stripping each of them is 85MB/s (in the beginning sectors) I will get 6X85MB/s=4.08Gb/s? Is it reasonable to expect this kind of speed? Something tells me that there will be some other

Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-18 Thread Yuri
Glen Barber wrote: No, that is not reasonable (but in a perfect world, would be correct). You are limited by the bus speed and controller buffer speed (whichever is slower). My motherboard has PCI Express v2.0, that is 500MB/s limitation. Also it has HD/RAID controller Intel ICH10R

Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-18 Thread Erik Trulsson
On Mon, May 18, 2009 at 08:07:10PM -0700, Yuri wrote: Glen Barber wrote: No, that is not reasonable (but in a perfect world, would be correct). You are limited by the bus speed and controller buffer speed (whichever is slower). My motherboard has PCI Express v2.0, that is

Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-06 Thread Wojciech Puchar
I am seeing 85MB/s as a speed of a single Hitachi 1TB HD. How high can you go by mirroring or striping 2, 3, 4 harddrives? mirroring - the same, just with 2 processes reading both can get the bandwidth. make sure you use -s high enough (like 1048576) doing gmirror label stripping - the

What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-05 Thread Yuri
I am seeing 85MB/s as a speed of a single Hitachi 1TB HD. How high can you go by mirroring or striping 2, 3, 4 harddrives? Any experiences? Thank you, Yuri ___ freebsd-questions@freebsd.org mailing list

Re: What is the highest hard drive read/write speed you were able to achieve by entire disk mirroring or striping?

2009-05-05 Thread Manolis Kiagias
Yuri wrote: I am seeing 85MB/s as a speed of a single Hitachi 1TB HD. How high can you go by mirroring or striping 2, 3, 4 harddrives? Any experiences? Thank you, Yuri Highly unscientific measurement here, but I seem to be getting a max of ~160 MB/s by striping two Seagate 500Gb drives.