Created attachment 593389 [details]
livecd

Description of problem:
RHEV-H installation process didn't filter out livecd device which managed by multipath

Version-Release number of selected component (if applicable):
rhev-hypervisor6-6.3-20120615.1.el6

How reproducible:
100%

Steps to Reproduce:
1. Make livecd to USB disk (Newer usb sticks: Sandisk 16G) via command:
rhevh-iso-to-disk --format rhevh-6.3-20120615.1.el6.iso /dev/sdb
2. Boot from the livecd.
3. Enter the select disk page in TUI installation process.
 
Actual results:
1. The livecd device (Newer usb sticks) is listed in select disk page.
2. Older USB sticks which isn't management by multipath can be filtered out.

====================================
# multipath -ll
1SanDisk dm-1 SanDisk,Cruzer Edge
size=15G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 0:0:0:0 sda 8:0  active ready running
1ATA_WDC_WD5000AAKS-75V0A0_WD-WCAWF6238839 dm-0 ATA,WDC WD5000AAKS-7
size=466G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 1:0:0:0 sdb 8:16 active ready running


ovirt-config-installer (lines 457-466)
======================================
Storage = storage.Storage()
        dev_names, self.disk_dict = Storage.get_udev_devices()
        self.displayed_disks = {}
        self.valid_disks = []
        for dev in dev_names:
            dev = translate_multipath_device(dev)
            if not self.displayed_disks.has_key(dev):
                if self.disk_dict.has_key(dev) and dev != self.live_disk:
                    dev_bus,dev_name,dev_size,dev_desc,dev_serial,dev_model = self.disk_dict[dev].split(",",5)
                    dev_desc = pad_or_trim(32, dev_desc)


Can't filter USB stick which managed by multipath (newer usb sticks)
=======================================
 get_live_disk()
'dm-6'
>>> get_live_disk().rstrip('0123456789')
'dm-'


Can filter USB sticks which isn't managed by multipath (older USB sticks)
=======================================
get_live_disk()
'sda1'
>>> dev_name, disk_dict = storage.Storage().get_udev_devices()
>>> print dev_name
['/dev/mapper/1ATA_WDC_WD5000AAKS-75V0A0_WD-WCAWF6238839', '/dev/sda']
>>> get_live_disk().rstrip('0123456789')
'sda'

Expected results:
RHEV-H installation process can filter out all livecd devices.

Additional info:
The same issue occurs in rhevh-6.2-20111117.1.el6, so it isn't a regression bug.