[Bug 230246] GPT label mishandling

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230246

--- Comment #14 from Mason Loring Bliss <mason at blisses.org> ---
More interesting:

# gmirror list
# ls /dev/gpt
efi0    efi1    swap0   swap1   tank0   tank1
# dd if=/dev/zero of=/dev/gpt/efi0 bs=1m
dd: /dev/gpt/efi0: end of device
2+0 records in
1+0 records out
1048576 bytes transferred in 0.171360 secs (6119140 bytes/sec)
# dd if=/dev/zero of=/dev/gpt/efi1 bs=1m
dd: /dev/gpt/efi1: end of device
2+0 records in
1+0 records out
1048576 bytes transferred in 0.012050 secs (87022279 bytes/sec)
# dd if=/dev/zero of=/dev/gpt/swap0 bs=1m
dd: /dev/gpt/swap0: Operation not supported
# gmirror list
Geom name: swap
State: DEGRADED
Components: 2
Balance: load
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 3028984319
Type: AUTOMATIC
Providers:
1. Name: mirror/swap
   Mediasize: 8589934080 (8.0G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
Consumers:
1. Name: diskid/DISK-CVDA5066005L1207GNp2
   Mediasize: 8589934592 (8.0G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r1w1e1
   State: ACTIVE
   Priority: 0
   Flags: (null)
   GenID: 0
   SyncID: 1
   ID: 1191147779

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