oops : both tried kernel 2.4.4-pre5 (with ide patches) and kernel 2.2.14pre12 (with ide and raid patches) On Sun, 22 Apr 2001 [EMAIL PROTECTED] wrote: > i'm going to build a raid5 config with 6*maxtor 80gb > mainbord is an asus p2b-d (with dual 450 and 512mb ram) > and 2 addon ultra66 promise controllers > > i did some tests using hdparm (4.1) > and i get these result : > > (hda and hdc are on the onboard controller) > > /dev/hda: > Timing buffered disk reads: 64 MB in 4.94 seconds = 12.96 MB/sec > > /dev/hdc: > Timing buffered disk reads: 64 MB in 4.94 seconds = 12.96 MB/sec > > /dev/hde: > Timing buffered disk reads: 64 MB in 2.26 seconds = 28.32 MB/sec > > /dev/hdg: > Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec > > /dev/hdi: > Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec > > /dev/hdk: > Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec > > kernel reports : > hda: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(33) > hdc: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(33) > hde: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > hdg: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > hdi: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > hdk: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > > and i use hdparm -m16 -c1 -d1 -a8 on all hd's > so why do i only see 13mb/sec on the ultra33 controller > (i thought 28mb/sec would be possible on the ultra33 controller) > > i also made a raid0 on the 6 disks > and this gives me : > > /dev/md0: > Timing buffered disk reads: 64 MB in 2.13 seconds = 30.05 MB/sec > > > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to [EMAIL PROTECTED] > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
