Re: Clarifying RAID questions...??

>> Is there anyone experienced similar physical disk design on platform like ours. >> Or shall I expect a bottleneck on my read or write i/o? We use RAID 5 on a 2 CPU compaq pentium pro (SCO OS5 Online 5). The system is a lot faster and more reliable than the previous system but although users do not often complain about response I have noticed that the system seems to be spending a lot of time waiting in i/o and CPU is 0% idle most of the time. e.g. sar -u shows SCO_SV pluto 3.2v5.0.4 Pent Pro %usr %sys %wio %idle (-u) 09:10:22 10 4 81 5 09:10:24 8 6 81 5 09:10:25 8 4 83 5 09:10:26 8 6 82 4 09:10:27 9 5 81 5 09:10:28 7 5 85 3 09:10:29 11 7 79 3 09:10:30 4 3 92 1 09:10:31 9 4 86 1 09:10:32 29 4 67 0 Average 10 5 82 3 All our disks are on the one chamnnel and we have something like 9 2.1 Gb disks >NO RAID5! NO RAID5! NO RAID5! NO RAID5! NO RAID5! > >>cost of drives today there is simply no excuse to not use RAID10, but >if your org is really that dirt poor, and I admit to the very real What is RAID 10 ? We are upgrading to IDS 7.3 and will then look at our hardware config and the possibility of not using RAID 5 >>Art S. Kagel