Appears to not work with LVM volumes containing underscores in name

[gadg3ts]

I'd previously installed the collector scripts on a number of Ubuntu machines where all was good. Now I'm putting it on some RedHat machines and I wasn't getting all of the volume names from an snmpwalk.

[root@monitor01 ~]# snmpwalk -v2c -c public hostname .1.3.6.1.3.1.2
SNMPv2-SMI::experimental.1.2.1 = STRING: "cciss/c0d0"
SNMPv2-SMI::experimental.1.2.2 = STRING: "cciss/c0d1"
SNMPv2-SMI::experimental.1.2.3 = ""
SNMPv2-SMI::experimental.1.2.4 = ""
SNMPv2-SMI::experimental.1.2.5 = ""
SNMPv2-SMI::experimental.1.2.6 = ""
SNMPv2-SMI::experimental.1.2.7 = ""
SNMPv2-SMI::experimental.1.2.8 = ""
SNMPv2-SMI::experimental.1.2.9 = ""

Turns out the difference between the machines was that some of the LVM volumes contain underscores:
$ iostat -N -xkd | awk '{print $1}'
Device:
cciss/c0d0
cciss/c0d1
vg_sas-lv_root
vg_sas-lv_swap
vg_sas-lv_attachments
vg_sas-sas_logs
vg_sas-sas_httpdcache
vg_ssd-lv_attachments
vg_ssd-lv_cache

My perl is a bit rusty, so I've taken the simpler option and added another sed replace to the collector crontab entry:

• * * * * root cd /tmp && iostat -N -xkd 30 2 | sed 's/,/./g' | sed 's/_/-/g' > io.tmp && mv io.tmp iostat.cache

This now gives me:
[root@monitor01 ~]# snmpwalk -v2c -c public hostname .1.3.6.1.3.1.2
SNMPv2-SMI::experimental.1.2.1 = STRING: "cciss/c0d0"
SNMPv2-SMI::experimental.1.2.2 = STRING: "cciss/c0d1"
SNMPv2-SMI::experimental.1.2.3 = STRING: "vg-sas-lv-root"
SNMPv2-SMI::experimental.1.2.4 = STRING: "vg-sas-lv-swap"
SNMPv2-SMI::experimental.1.2.5 = STRING: "vg-sas-lv-attachments"
SNMPv2-SMI::experimental.1.2.6 = STRING: "vg-sas-sas-logs"
SNMPv2-SMI::experimental.1.2.7 = STRING: "vg-sas-sas-httpdcache"
SNMPv2-SMI::experimental.1.2.8 = STRING: "vg-ssd-lv-attachments"
SNMPv2-SMI::experimental.1.2.9 = STRING: "vg-ssd-lv-cache"

Thanks,
Sean