Re: RAID 1 Most RAID implementations seem to use a single SCSI controller. That single controller is a single point of failure. The Solaris mirrored drives avoid that particular issue by using two SCSI cards at the expense of some disk performance. Re: Diagnostic tools I'd call the Customer Satisfaction Center folks. Regards, Alex Johnson Invensys 10707 Haddington Houston, TX 77063 713.722.2859 (office) 713.722.2700 (switchboard) 713.932.0222 (fax) ajohnson@xxxxxxxxxxx <mailto:ajohnson@xxxxxxxxxxx> Shop at the I/A Store and Save on all Invensys Products - www.iastore.com <http://www.iastore.com> Come to the Invensys Showcase: http://www.invensysshowcase.com/ <http://www.invensysshowcase.com/> -----Original Message----- From: stan [SMTP:stanb@xxxxxxxx] Sent: Wednesday, August 28, 2002 1:37 PM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] How can I get the status of a RAID drive on a 51D? On Wed, Aug 28, 2002 at 01:59:00PM -0400, Roger Smith wrote: > > I believe that RAID 1 is mirrored drives. The other common usage is RAID 5 > that includes striping and parity. Sorry I can't help with your problem > though. > Ture enough. However in this case thier is a significant difference in what Foxboro calls "mirrored drives", and what they call "RAID 1". Mirrored drives are provided in Sun enclosures, and are connected to 2 SCSI controlers in teh Sun Box. The mirrorig is done using software. This is Sun provided software, that gets a Foxboro supplied "wrapper" script called dft. By using the Sun provided software one can check the status of both of the drives, and generate email/alarms.paging when one fails. What Foxboro provided on our latest project, however was an external "RAD 1" box (yest that really mirrored). However it is conected to the SUN box using SCSI cables (not certain at the moment if there just 1 or 2). So, I'm looking for the vendor supplied software that will let me query this external box for it's disk statuses, in order to generate alarms/emails when one of these fails, rather than waiting for the 2nd one to fail! You would think Foxboro would hanlde this as a system alarms, but it appears that they don not. -- "They that would give up essential liberty for temporary safety deserve neither liberty nor safety." -- Benjamin Franklin _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave