[PATCH 2/2] Document user_friendly_names and available workarounds
Ritesh Raj Sarraf
rrs at researchut.com
Fri Apr 17 13:56:45 UTC 2009
Explain the problems with user_friendly_names and
explain other reliable options.
Signed-off-by: Ritesh Raj Sarraf <rrs at researchut.com>
---
debian/multipath-tools.README.Debian | 31 +++++++++++++++++++++++++++++++
1 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/debian/multipath-tools.README.Debian b/debian/multipath-tools.README.Debian
index 249ef7f..ffaaa63 100644
--- a/debian/multipath-tools.README.Debian
+++ b/debian/multipath-tools.README.Debian
@@ -9,6 +9,37 @@ If you want multipath-tools to use easier-to-read names, set
user_friendly_names = yes
in the 'defaults' section of /etc/multipath.conf.
+Note: While widely used (including the Debian Installer, which depends
+on it), user_friendly_names can sometimes lead to locking issues
+resulting in some maps not having friendly_names.
+For details, please see:
+https://bugzilla.redhat.com/show_bug.cgi?id=445268
+
+Other ways to reliably reference a multipath map are:
+1) User Defined alias
+ Each map can be individually be assigned a friendly alias, using
+ which it can be referred.
+ Example:
+ multipaths {
+ multipath {
+ wwid 3600a0b800011a2be00001dfa46cf0620
+ alias mydev1
+ }
+ }
+ Refer to the multipath.conf man page for additional details
+
+2) Labels
+ User can assing a filesystem label to each multiapthed device and
+ access them using labels.
+
+ To assign a label to a multipathed device:
+ e2label /dev/mapper/3600a0b800011a2be00001dfa46cf0620 mydev1
+ and then add an entry like the following in /etc/fstab
+ LABEL=mydev1 /mnt/mountpoint ext3 defaults 0 0
+
+ Note: This feature is specific to filesystems and will not work if you want
+ to access the raw device or if your filesystem doesn't support labels
+
Where did my FC-connected filesystem go?
========================================
If you were previously mounting a device connected to your system by
--
1.6.2.3
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