[Info-vax] OpenVMS Integrity RX-3600 SCSI hot/warm SCSI switching question

[will.lee at connecmax.com]

On Wednesday, June 11, 2014 at 6:23:47 AM UTC+8, Rich Jordan wrote:
> I'm going through the guides that HP provides but haven't found a solid up/down on this.  The assumed answer is 'no, thats not a supported warm/hotswap event'.  But since the card itself is in a hardware hot/warm swappable slot (though I don't think VMS supports it) maybe...
> 
> The RX3600 has a dual port Ultra 320 SCSI card in it for external tapes. Primary storage is on other controllers (SAS and a RAID controller).  The dual SCSI card reports as an LSI Logic 1030 U320 to VMS.  I thought that was the A7173A PCI-X card but that is listed as not supported on an RX3600, so I'm not sure what it is.
> 
> The site is retiring a tape drive that is the only device on one of the two SCSI ports in order to add some sideline disk storage (a U320 universal drive shelf) that will be used for staging VMS backups to offline storage.
> 
> On Alpha I've never had a problem disconnecting devices (and adding devices) to a SCSI bus that is not in active use.  Active ones, not so much (and that was accidental).  All of this system's active disk storage is on other buses, and other controllers.  How likely are we to have issues turning off the tape drive, disconnecting it, connecting the drive shelf, powering it on, and issue MCR SYSMAN IO AUTO to get the new drives online on an Integrity?
> 
> The reason for the question is a severe downtime intolerance.  I don't know when we'd be able to get the disks online short of a rare (and not immediately forthcoming) maintenance window.  But an unscheduled system kaboom would still be a bad thing.
> 
> Thanks for any input.

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