I am trying to learn more about ISCSI and Multipath (MPIO) setup on a proxmox system. I thought I had everything working, but have that terrible spidey sense that something is incorrectly configured, am seeing no speed improvements, and even see an oddity "mpath0-part1" but no "mpath0-part2" as I would have expected from the outset.
High level topology: I have a single LUN setup on my NAS with a single target accepting multiple connections on all (both) nic interfaces via an ISCSI target. (Is this even correct or should it be two iscsi targets?) On the initiator side, two ifaces setup, each with an assigned ip.
lsblk give me: (sdg and sdf)
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 279.4G 0 disk
├─sda1 8:1 0 1007K 0 part
├─sda2 8:2 0 512M 0 part
└─sda3 8:3 0 278.9G 0 part
├─pve-swap 253:0 0 30G 0 lvm
└─pve-root 253:1 0 69.5G 0 lvm /
sdb 8:16 0 279.4G 0 disk
└─sdb1 8:17 0 279.4G 0 part
sdc 8:32 0 931.5G 0 disk
├─sdc1 8:33 0 517.7M 0 part
├─sdc2 8:34 0 929.5G 0 part
└─sdc4 8:36 0 500M 0 part
sdd 8:48 0 931.5G 0 disk
└─sdd1 8:49 0 931.5G 0 part
sde 8:64 0 7.8T 0 disk
└─sde1 8:65 0 7.8T 0 part
sdf 8:80 0 7.8T 0 disk
├─sdf1 8:81 0 7.8T 0 part
└─mpath0 253:2 0 7.8T 0 mpath
└─mpath0-part1 253:3 0 7.8T 0 part
├─iscsi_volumegroup-vm--100--disk--0 253:4 0 250G 0 lvm
└─iscsi_volumegroup-vm--102--disk--2 253:5 0 250G 0 lvm
sdg 8:96 0 7.8T 0 disk
├─sdg1 8:97 0 7.8T 0 part
└─mpath0 253:2 0 7.8T 0 mpath
└─mpath0-part1 253:3 0 7.8T 0 part
├─iscsi_volumegroup-vm--100--disk--0 253:4 0 250G 0 lvm
└─iscsi_volumegroup-vm--102--disk--2 253:5 0 250G 0 lvm
sdh 8:112 0 7.8T 0 disk
└─sdh1 8:113 0 7.8T 0 part
sr0 11:0 1 1024M 0 rom
nvme0n1 259:0 0 477G 0 disk
└─nvme0n1p1 259:1 0 477G 0 part
nvme1n1 259:2 0 477G 0 disk
└─nvme1n1p1 259:3 0 477G 0 part [SWAP]
multipath -ll
mpath0 (long_jibberish_like_ 6840d4606db20ad5) dm-2 SYNOLOGY,iSCSI Storage
size=7.8T features='0' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=50 status=active
|- 10:0:0:1 sdg 8:96 active ready running
`- 8:0:0:1 sdf 8:80 active ready running
Through trying to get this working, I also appear to have ended up with additional sde, sdh devices, and not sure if sdf1 and sdg1 should be present...
There is no hyper critical stuff on any of these drives, as I am still in a learning phase, my important docs (etc) are stored elsewhere.
- Is there meant to be a mpath0-part2?
- What's up with sdf1, and sdg1?
- What's up with sde, and sdh?
