Hi all,
I checked the latest dm-multipath in RHEL4U4 with Hitachi Storage
Arrays. Normally it should work now without a modified or created
/etc/multipath.conf. But it does not. I beliefe the file hwtable.c of
the source is not correct. The right entries on kernel.org did not found
the way to the RedHat package. Here my suggestions for file hwtable.c:
Wrong lines (please delete):
r += store_hwe_ext(hw, "HP", "OPEN-.", MULTIBUS, DEFAULT_GETUID,
NULL,
"0", "0", "tur", FAILBACK_UNDEF, NULL);
r += store_hwe(hw, "HITACHI", "DF400", MULTIBUS,
DEFAULT_GETUID);
r += store_hwe(hw, "HITACHI", "DF500", MULTIBUS,
DEFAULT_GETUID);
r += store_hwe(hw, "HITACHI", "DF600", MULTIBUS,
DEFAULT_GETUID);
r += store_hwe_ext(hw, "HITACHI", "DF600F*", GROUP_BY_PRIO,
DEFAULT_GETUID, "/sbin/mpath/prio_hds_modular %d", "0",
"0",
"readsector0", -FAILBACK_IMMEDIATE, NULL);
Correct lines (please add):
r += store_hwe_ext(hw, "{HITACHI,HP}", "OPEN-.*", MULTIBUS,
DEFAULT_GETUID, NULL, "0", "0", "readsector0",
FAILBACK_UNDEF,
NULL);
r += store_hwe_ext(hw, "HITACHI", "DF.*", GROUP_BY_PRIO,
DEFAULT_GETUID, "/sbin/mpath_prio_hds_modular %d", "0",
"0",
"readsector0", -FAILBACK_IMMEDIATE, NULL);
I hope the regular expressions are correct for dm-multipath.
The file multipath.conf.defaults does also not match the entries in file
hwtable.c.
A temporary fix for the problem above is to create the file
/etc/multipath.conf with the entries below:
devices {
device {
vendor "HITACHI"
product "DF.*"
path_grouping_policy group_by_prio
prio_callout "/sbin/pp_hds_modular %d"
path_checker readsector0
getuid_callout "/sbin/scsi_id -g -u -s
/block/%n"
failback immediate
}
device {
vendor "HITACHI"
product "OPEN-.*"
path_grouping_policy multibus
path_checker readsector0
getuid_callout "/sbin/scsi_id -g -u -s
/block/%n"
}
}
Regards
Matthias Rudolph
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