https://community.hpe.com/t5/operating-system-hp-ux/mirroring/m-p/3517243#M844596 hi,<BR /><BR />the problem is:<BR />I have 3 luns on FC60 mirror to VA7400. The total size of the 3 LUNs is about 240gb. The FC60 and VA7400 is link with fibre channel (fc). the whole mirroring took about more than 5 hrs. Isn't the throughput of fc 2gbs? mirror/ux is just the copying of raw data, why is it that slow? <BR /><BR />Please advice.<BR /><BR />Thanks. Mon, 04 Apr 2005 09:25:44 GMT Darren Poh_1 2005-04-04T09:25:44Z https://community.hpe.com/t5/operating-system-hp-ux/mirroring/m-p/3517243#M844596 hi,<BR /><BR />the problem is:<BR />I have 3 luns on FC60 mirror to VA7400. The total size of the 3 LUNs is about 240gb. The FC60 and VA7400 is link with fibre channel (fc). the whole mirroring took about more than 5 hrs. Isn't the throughput of fc 2gbs? mirror/ux is just the copying of raw data, why is it that slow? <BR /><BR />Please advice.<BR /><BR />Thanks. Mon, 04 Apr 2005 09:25:44 GMT https://community.hpe.com/t5/operating-system-hp-ux/mirroring/m-p/3517243#M844596 Darren Poh_1 2005-04-04T09:25:44Z https://community.hpe.com/t5/operating-system-hp-ux/mirroring/m-p/3517244#M844597 The throughput of fibre channel depends. FC is not always 2gb (that's 2 giga-bits which is roughly 170 MB [mega bytes per sec]), it could be 1gb, 4gb or even 10gb. Like I said, it depends on your hardware.<BR /><BR />The speed of the mirroring depends upon the following factors:<BR />Speed of disk reads<BR />Speed of disk writes<BR />Other IO activity<BR />Fibre Channel speeds<BR /><BR />The SLOWEST link is the DISK DRIVE. This means you could have a 10gb FC interface and you still aren't going to push data to the disk drive any faster than it handle.<BR /><BR />live free or die<BR />harry d brown jr Mon, 04 Apr 2005 09:42:08 GMT https://community.hpe.com/t5/operating-system-hp-ux/mirroring/m-p/3517244#M844597 harry d brown jr 2005-04-04T09:42:08Z