Re: Catastrophic disk failure

So, this thread has made me nervous.  What *should* I see?  When I look at parity protection on my IBM i (7.4) I see this:

                     Display Disk Configuration Protection

           Serial Resource                      Hot Spare
 ASP Unit  Number          Type Model Name Protection         Protection
   1 Unprotected
        1  Y210WAE1FB13    5B41  099  DMP001     RAID 5                  N
        2  Y210WAE0RMT0    5B41  099  DMP005     RAID 5                  N
        3  Y210WAE0NBG9    5B41  099  DMP007     RAID 5                  N
        4  Y210WAE1CV48    5B41  099  DMP003     RAID 5                  N
        5  Y210WAE15BLD    5B41  099  DMP009     RAID 5                  N
        6  Y210WAE0S2YD    5B41  099  DMP013     RAID 5                  N
        7  Y210WAE15BNN    5B41  099  DMP011     RAID 5                  N

                        Display Device Parity Status

 Parity                      Resource                      Hot Spare
   Set  ASP Unit  Type Model Name       Status Protection
     1            57D8  001  DC01       RAID 5 N
          1    2  5B41  099  DMP005 Active
          1    4  5B41  099  DMP003 Active
          1    3  5B41  099  DMP007 Active
          1    1  5B41  099  DMP001 Active
          1    7  5B41  099  DMP011 Active
          1    6  5B41  099  DMP013 Active
          1    5  5B41  099  DMP009     Active


Is it the protection status in the "Display Disk Configuration Protection" that clues me in that I am "Unprotected"?  So the RAID 5 status tells me what, exactly?


Pete Helgren
www.petesworkshop.com
GIAC Secure Software Programmer-Java
AWS Certified Cloud Practitioner
Twitter - Sys_i_Geek IBM_i_Geek

On 1/8/2021 8:02 AM, Steinmetz, Paul via MIDRANGE-L wrote:

Sample
Serial Resource Hot Spare
ASP Unit Number Type Model Name Protection Protection
1 Unprotected
1 Y6804KV02VAX 5B21 109 DMP001 RAID 5 Y
2 Y6804KV02WUX 5B21 109 DMP007 RAID 5 Y
3 Y6804KV060EX 5B21 109 DMP009 RAID 5 Y

Paul

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Thomas Garvey
Sent: Friday, January 08, 2021 8:55 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Catastrophic disk failure

Hi,

We experienced a disk drive failure and were unconcerned since we had replacements available and believed that RAID5 was protecting us.
Now our technician is not sure whether our disks are actually protected.

Can someone tell me what the DST screen should show if our drives actually have RAID enabled? We can't get through an IPL but we can boot it into DST at least.
We are afraid we may have to rebuild from a system save tape.