System information

po rt_name — 64-bit port name
Remo t e Po rt : /sys/cl ass/fc_remo te_po rts/rpo rt-H: B-R/
po rt_i d
no d e_name
po rt_name
d ev_l o ss_tmo — number of seconds to wait before marking a link as "bad". Once a
link is marked bad, I/O running on its corresponding path (along with any new I/O on
that path) will be failed.
The default d ev_l o ss_tmo value varies, depending on which driver/device is used. If a
Qlogic adapter is used, the default is 35 seconds, while if an Emulex adapter is used, it
is 30 seconds. The d ev_l o ss_tmo value can be changed via the
scsi _transpo rt_fc module parameter d ev_l oss_tmo , although the driver can
override this timeout value.
The maximum d ev_l o ss_tmo value is 600 seconds. If d ev_l oss_tmo is set to zero or
any value greater than 600, the driver's internal timeouts will be used instead.
fast_i o _fai l _tmo — length of time to wait before failing I/O executed when a link
problem is detected. I/O that reaches the driver will fail. If I/O is in a blocked queue, it will
not be failed until d ev_l o ss_tmo expires and the queue is unblocked.
Ho st : /sys/cl ass/fc_ho st/ho stH/
po rt_i d
i ssue_l i p — instructs the driver to rediscover remote ports.
25.1.2. Nat ive Fibre Channel Drivers and Capabilit ies
Red Hat Enterprise Linux 6 ships with the following native fibre channel drivers:
l pfc
q l a2xxx
zfcp
mptfc
bfa
Table 25.1, “ Fibre-Channel API Capabilities” describes the different fibre-channel API capabilities of
each native Red Hat Enterprise Linux 6 driver. X denotes support for the capability.
T able 25.1. Fib re- C h an n el API C ap ab ilit ies
l pfc q l a2xxx zfcp mptfc bfa
Transport
po rt_i d
X X X X X
Transport
no d e_name
X X X X X
Transport
po rt_name
X X X X X
⁠Chapt er 2 5. O nline St orag e Manag ement
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