Encontrei. A informação agora parece estar disponível via hastctl list
myhast:
role: primary
provname: myhast
localpath: /dev/gpt/hast
extentsize: 2097152 (2.0MB)
keepdirty: 64
remoteaddr: 192.168.1.2
replication: memsync
status: complete
workerpid: 1540
dirty: 0 (0B)
statistics:
reads: 1216
writes: 24814
deletes: 0
flushes: 0
activemap updates: 736
local errors: read: 0, write: 0, delete: 0, flush: 0
queues: local: 0, send: 0, recv: 0, done: 0, idle: 255