Define one node as secondary and discard data on this
drbdadm secondary all drbdadm disconnect all drbdadm -- --discard-my-data connect all
Define anoher node as primary and connect
drbdadm primary all drbdadm disconnect all drbdadm connect all
drbdadm secondary all drbdadm disconnect all drbdadm -- --discard-my-data connect all
drbdadm primary all drbdadm disconnect all drbdadm connect all
Code point range | UTF-8 | UTF-16 | |||||
---|---|---|---|---|---|---|---|
hexadecimal | binary |
Bytes (code bits) |
binary | hexadecimal |
Bytes (code bits) |
binary | hexadecimal |
00 00 00 —00 00 7F
|
0000 0000 0000 0000 0000 0000 —0000 0000 0000 0000 0111 1111
|
1 (7) |
0xxx xxxx
|
00 —7F
|
2 (16) |
xxxx xxxx xxxx xxxx
|
00 00 —FF FF
|
00 00 80 —00 07 FF
|
0000 0000 0000 0000 1000 0000 —0000 0000 0000 0111 1111 1111
|
2 (11) |
110x xxxx 10xx xxxx
|
C2 80 —DF BF
|
|||
00 08 00 —00 FF FF
|
0000 0000 0000 1000 0000 0000 —0000 0000 1111 1111 1111 1111
|
3 (16) |
1110 xxxx 10xx xxxx 10xx xxxx
|
E0 A0 80 —EF BF BF
|
|||
01 00 00 —10 FF FF
|
0000 0001 0000 0000 0000 0000 —0001 0000 1111 1111 1111 1111
|
4 (21) |
1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx
|
F0 90 80 80 —F4 8F BF BF
|
4 (20) |
1101 10xx xxxx xxxx 1101 11xx xxxx xxxx
|
D8 00 DC 00 —DB FF DF FF
|
To configure a local device as an RDM disk:
ls -l /vmfs/devices/disks
t10.F405E46494C4540046F455B64787D285941707D203F45765
vmkfstools -z /vmfs/devices/disks/diskname /vmfs/volumes/datastorename/vmfolder/vmname.vmdk
For example:
vmkfstools -z /vmfs/devices/disks/t10.F405E46494C4540046F455B64787D285941707D203F45765 /vmfs/volumes/Datastore2/localrdm1/localrdm1.vmdk
Linux:
ping -M do -s 8972 xxx.xxx.xxx.xxx
OSX/BSD:
ping -D -s 8184 xxx.xxx.xxx.xxx
Windows:
ping -f -l 9000 xxx.xxx.xxx.xxx
If you’ve forgotten to enable jumbo frames/9k MTU on your client device you’re sending the ping from:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes ping: sendto: Message too long
If you have enabled jumbo frames on your client but not the destination (or a switch in between):
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes Request timeout for icmp_seq 0
If you’ve done everything righ:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes 8192 bytes from xxx.xxx.xxx.xxx: icmp_seq=0 ttl=128 time=0.714 ms