Michael Robinton wrote: > > > > > My question is: Why does it take 3.834 seconds to copy a 57071888 > > > > byte file from a single drive (a degraded raid-1 array) but 5.727 > > > > seconds to copy the same file from a fully functional > > > raid-1 with two > > > > disks on independant interfaces? (/dev/hde and /dev/hdg are each > > > > master on each of the two interfaces on the ultra66) > > > > > > date read from a raid 1 comes from the first available > > > device, thus you > > > get a performance increase over the average access time of a single > > > device. This is similar to the advantage gained with a raid 0 array. > > > > Which sounds good, except that the complaint is that RAID1 is SLOWER than a > > single drive, not faster. > > Aw shucks! -- that doesn't make sense does it? heh... heh... > - You mentioned where the data is coming from, but you didn't explicitly state where it is going to. How about: in a degraded RAID1 you only have to do half the writes. -- Dan Jones, Manager, Storage Products VA Linux Systems V:(408)542-5737 F:(408)745-9911 1382 Bordeaux Drive [EMAIL PROTECTED] Sunnyvale, CA 94089 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]
