Re: Replacing Disk Drives With Higher Capacity

[Bill <brobins3d@xxxxxxxxx>]

Jones, John (US) wrote:
> The incremental removal/replacement works, but will take days to complete and you wind up with data that won't necessarily be distributed across the disks evenly.  Performance will also likely be impacted during the removal process.
>
> I'd do it (and have done it) the old fashioned way:
> - GO SAVE/21.
> - GO SAVE/21 again just in case.
> - Power off.
> - Pull all old drives out, noting the slot where each drive came from.
> - Put the replacement drives in.
> - Power up, DST, start mirroring & add to ASP.
> - GO RESTORE/21.
>
> If something goes wrong you can power off & put the old drives back in (since their slot was noted).
>
> This has the most user downtime but you end up with the most optimal data layout (best performance).

And result in a loss of all spooled files and all of the other niceties 
that are lost in this scenario.  Appreciate the thought though.


> BTW, if your apps will work on a newer OS release, upgrading to a 550 with a dozen 141GB disks would probably pay for itself in reduced maintenance and power/HVAC costs while running circles around the 730.  And take 8 or 9 Us in one rack v. about two full racks worth of space for the 730 + DASD tower.

And incur a new key charge from Infor for daring to improve my machine. 
 Same for Extol's EDI package.  It's been a year or two, but the last 
time I spec'd a machine, it was over 100 grand to get a machine -near- 
the performance of the 730/1506.  So, unless a 550 runs on the power of 
a 60 watt bulb, it'd take quite some time to recoup the expenses you 
speak of.

Bill