Re: load source concurrent maintenance

[Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx>]

lbolhuis@xxxxxxxxxx wrote:
> Joe,
>
>   You are not SOL if D01 dies, only if it Dies and then you power off the 
> system before you replace it.   D01 (like all the others) can be 
> concurrently replaced and rebuilt with no loss of data or uptime. The 
> 'Gotcha' is that if D01 is dead and you power down you cannot IPL from 
> that drive because it's dead.  Unless they've beefed up the logic in the 
> RAID cards significantly then you would be stuck with a System reload at 
> that point. 
>
>   As a matter of practice we NEVER recommend powering down a system with 
> ANY failed drives no matter which one it is unless that's the Only way to 
> replace the drive. (Many older systems in the bottom end 270 and previous 
> had this restriction.) 
>   
I do have the bottom end 270.  So if it throws D01, I may well be out of 
luck; that's a VERY nasty gotcha.  My only hope will be to pop the 
drive, stick a new one in, and tell it to rebuild.  If it works, I'll be 
in good shape.  If not, I'm in for a complete reload and I'm not looking 
forward to that.

Seems to me that maybe the old 270 was not the best choice for my 
long-term production machine.  But if I keep good backups and it does 
throw D01 and I have to reload, I can always switch to mirroring before 
I do the reload.

Joe