Just an observation I had tonight transferring data off 3.5 inch 7200 rpm single drives. Drive one has a 187GB file and is mounted in my Newer Tech voyager dock and connected to my MacPro via FW 800. For the file the transfer time is approx 46 minutes. Now Drive 2 is in NewStar 3 single enclosure and there is 935 GB of data to transfer. I hooked the drive 2 Newstar enclosure via Esata to a Esata express card adapter into my MBP. I hooked the MBP into my gig ethernet router and logged into my MacPro and accessed the same internal 3 drive Raid and the same volume as drive one is transferring to. The 935 GB says it will take 2 hours to transfer. The drive 2 transfer seems to have had no effect on the drive one transfer speed, no slow down of 800 transfer. I know Esata is much faster but it goes into my gig Ethernet so that should max out at a gig throughput at best right? How come the Voyager dock is so much slower. FW 800 should be .8
the transfer speed of the gig Ethernet or at least somewhat close to that right? My take is the MacPro FW 800 buss is kinda slow but WTF? is the MacPro latest 12 core known for marginal FW800 performance. Drive 2 is a 1TB drive and Drive 1 is a 500GB drive. Both were formated mac os extended, not journaled before the source files were copied to them so both should be reasonably contiguous files without any fragmenting. Both are Seagate drives. Curious what more I can learn from this observation.
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
[Non-text portions of this message have been removed]
| Reply via web post | Reply to sender | Reply to group | Start a New Topic | Messages in this topic (1) |
No comments:
Post a Comment