kern/121364: [gmirror] Removing all providers create a "zombie" mirror

[Kena]

The following reply was made to PR kern/121364; it has been noted by GNATS.

From: Kena <kena at vodka-pomme.net>
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: kern/121364: [gmirror] Removing all providers create a "zombie" mirror
Date: Wed, 5 Mar 2008 08:26:24 +0100

 Hi,
 
 since the two aforementioned disks (da0 and da1) are now in production  
 elsewhere, I am repeating the test with ggate. I believe the results  
 are similar as in my previous report.
 
 0. for i in 0 1; do dd if=/dev/zero of=d$i bs=1024 count=100k; ggatel  
 create d$i; done
 
 1. gmirror label -h test1 ggate0 ggate1; gmirror list
 
 Geom name: test1
 State: COMPLETE
 Components: 2
 Balance: split
 Slice: 4096
 Flags: NONE
 GenID: 0
 SyncID: 1
 ID: 538186880
 Providers:
 1. Name: mirror/test1
     Mediasize: 104857088 (100M)
     Sectorsize: 512
     Mode: r0w0e0
 Consumers:
 1. Name: ggate0
     Mediasize: 104857600 (100M)
     Sectorsize: 512
     Mode: r1w1e1
     State: ACTIVE
     Priority: 0
     Flags: NONE
     GenID: 0
     SyncID: 1
     ID: 731206240
 2. Name: ggate1
     Mediasize: 104857600 (100M)
     Sectorsize: 512
     Mode: r1w1e1
     State: ACTIVE
     Priority: 1
     Flags: NONE
     GenID: 0
     SyncID: 1
     ID: 501776423
 
 At this point dmesg reports:
 GEOM_MIRROR: Device mirror/test1 launched (2/2).
 
 2. gmirror remove test1 ggate1 ; gmirror insert test1 ggate1 ; gmirror  
 remove test1 ggate0; gmirror list
 
 (no output from gmirror list)
 
 At this point dmesg reports:
 GEOM_MIRROR: Device test1: provider ggate1 destroyed.
 GEOM_MIRROR: Device test1: rebuilding provider ggate1.
 GEOM_MIRROR: Device test1: provider ggate0 destroyed.
 GEOM_MIRROR: Device test1: provider mirror/test1 destroyed.
 GEOM_MIRROR: Device test1: rebuilding provider ggate1 stopped.
 GEOM_MIRROR: Synchronization request failed (error=6).  
 ggate1[WRITE(offset=917504, length=131072)]
 GEOM_MIRROR: Device test1: provider ggate1 disconnected.
 GEOM_MIRROR: Device test1 destroyed.
 
 
 3. (intending to "re-activate" the mirror from provider ggate0, which  
 should be "clean"):
 
 # gmirror rebuild test1 ggate0
 gmirror: No such device: test1.
 
 # gmirror activate test1 ggate0
 Cannot read metadata from ggate0: Invalid argument.
 gmirror: Not fully done.
 
 (note: gmirror label was done with -h, so I would expect that the  
 metadata is there?)
 
 4. Rebooting the system (for a fresh start), then
 
 # ggatel create d0; ggatel create d1; gmirror load
 <prompt does not return>
 
 On the console, dmesg reports:
 GEOM_MIRROR: Device test1 destroyed.
 
 
 Let me know if you need anything else.
 
 -- 
 kena