Public bug reported:

Binary package hint: sysstat

Ubuntu Release: 8.04LTS
Package: sysstat
Package Version:  8.0.3-1ubuntu1
Expected: Using iostat -N statistics are shown against device mapper names 
(from /dev/mapper/*)
Actually Happened: Statistics are shown against devices labeled as "dm-n"

Further Information
=================

>From iostat manpage:
    -N     Display the registered device mapper names for any device mapper 
devices.  Useful for viewing LVM2 statistics.

Reproduction Transcript:

admin-u...@solok:~$ ls /dev/mapper
control  sda5_crypt  sdcard_crypt  solok-root  solok-rsnapshot  solok-swap_1
admin-u...@solok:~$ iostat
Linux 2.6.24-23-generic (solok)         09/04/09

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           1.18    0.20    1.06    2.88    0.00   94.68

Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
sda               8.67       180.92       131.48   13312145    9674338
dm-0             25.77       180.84       131.48   13305939    9674328
dm-1              9.64        89.71        49.41    6600722    3635848
dm-2              0.14         0.02         1.09       1288      79896
dm-3             15.99        91.10        80.98    6703346    5958584
mmcblk0           1.40         4.78        58.15     351570    4278440
dm-4              7.86         4.75        58.15     349698    4278440

admin-u...@solok:~$ iostat -N
Linux 2.6.24-23-generic (solok)         09/04/09

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           1.18    0.20    1.06    2.88    0.00   94.68

Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
sda               8.67       180.92       131.48   13312145    9674338
dm-0             25.77       180.83       131.48   13305939    9674328
dm-1              9.64        89.71        49.41    6600722    3635848
dm-2              0.14         0.02         1.09       1288      79896
dm-3             15.99        91.10        80.98    6703346    5958584
mmcblk0           1.40         4.78        58.15     351570    4278440
dm-4              7.86         4.75        58.15     349698    4278440

** Affects: sysstat (Ubuntu)
     Importance: Undecided
         Status: New

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iostat -N doesn't report device mapper names
https://bugs.launchpad.net/bugs/358382
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