Greetings,
I'm new to the list, but not a new user to /dev/md. I was hoping someone here
could tell me about their experiences with Software RAID-5 and IDE, as I
seem to be having some issues.
I just built a new system to play with (eventually, I'd like to use it as
a large file store for my mp3 collection ;) that consists of: SuperMicro
dual slot-1 (P6DBE), two P3/550/512/100's (Katami), with 256mb SDRAM/PC100.
The system has a single 20.0 gig (WDC) ide boot drive, nothing else hooked
to the built-in motherboard IDE ports, in fact, the secondary IDE port is
disabled in BIOS.
I have two Promise Ultra/66 PCI controllers, and I'm using linux-2.4.0-test2-ac2.
Connected to each Promise card, is a 40.0 GIG Maxtor ATA/66 7200 RPM drive. (4 total,
each on a dedicated IDE bus)
During the sync phase of RAID-5, initially, the rate starts out very fast. It hovers
around 18,000k/sec.
A few minutes in, however, the rate drops to 5000k/sec for the duration of
the resync, which is even slower than the resync rate of another box I have,
which is a single-cpu PPRO/200 using 4 18gig SCSI drives and an Adaptec 2940UW.
Watching the output of 'vmstat 1', 'bo' increases significantly just as the
resync rate starts to fall, which would explain it. But this doesnt seem to
happen on my SCSI box, it remains a consistent rate all the way through.
HERE
----
0 0 1 0 13212 196768 7840 0 0 18240 0 1248 1892 0 53 47
0 0 1 0 13208 196768 7844 0 0 18365 0 1251 2097 0 51 49
0 0 1 0 13208 196768 7844 0 0 18583 0 1302 2007 0 54 46
0 0 1 0 13208 196768 7844 0 0 18292 0 1239 1952 0 47 53
0 0 1 0 13208 196768 7844 0 0 18828 0 1271 2038 0 53 47
0 0 1 0 13208 196768 7844 0 0 14848 640 1270 2140 0 38 62
0 0 1 0 13208 196768 7844 0 0 6464 1441 1174 2152 0 11 88
0 0 1 0 13208 196768 7844 0 0 5360 1344 1056 1973 0 7 93
0 0 1 0 13208 196768 7844 0 0 5136 1280 1020 1826 0 6 94
0 0 1 0 13208 196768 7844 0 0 5344 1344 1053 1892 0 9 91
Anyone else notice this?
-George Shearer ([EMAIL PROTECTED])
