On 11/20/07, Asif Iqbal <[EMAIL PROTECTED]> wrote: > On Nov 19, 2007 1:43 AM, Louwtjie Burger <[EMAIL PROTECTED]> wrote: > > On Nov 17, 2007 9:40 PM, Asif Iqbal <[EMAIL PROTECTED]> wrote: > > > (Including storage-discuss) > > > > > > I have 6 6140s with 96 disks. Out of which 64 of them are Seagate > > > ST3300007FC (300GB - 10000 RPM FC-AL) > > > > Those disks are 2Gb disks, so the tray will operate at 2Gb. > > > > That is still 256MB/s . I am getting about 194MB/s
2Gb fibre channel is going to max out at a data transmission rate around 200MB/s rather than the 256MB/s that you'd expect. Fibre channel uses an 8-bit/10-bit encoding, so it transmits 8-bits of data in 10 bits on the wire. So while 256MB/s is being transmitted on the connection itself, only 200MB/s of that is the data that you're transmitting. Chad Mynhier _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
