iterdrives.py

iterdrives.py

import probstat, os, sys, popen2

# List of partitions possibly used in the array
li = ['/dev/hde1', '/dev/hdg1', '/dev/hdi1', '/dev/hdk1', '/dev/sdc1', '/dev/sdd1', '/dev/sde1', '/dev/sdf1']

# Assemble = Number of Devices in Array - Number of Parity Drives
# RAID 6 uses 2 parity drives.  So for an array of 10 partitions in RAID 6
# you would set assemble to 8
assemble = 5

# Number of drives used for pairty.  RAID 5 uses 1, RAID 6 uses 2
parity = 2

# The total number of devices in the raid array
devices = assemble + parity

total = 0
count = 0
for combo in probstat.Permutation(li,assemble):
	total = total + 1

for combo in probstat.Permutation(li,assemble):
	print "Combo %s/%s" %(count,total)
	count = count + 1
	drivelist = ""
	for drive in combo:
		drivelist = drivelist + drive + " "

	mdcmd = "mdadm --create --raid-devices=%s --level=6 --assume-clean /dev/md0 %s missing missing" %(devices,drivelist)

	mdproc = os.popen(mdcmd, 'w')
	mdproc.write("yes\n")
	print mdproc.close()

	print "cmd: %s return:" %(mdcmd)

	mntcmd = "mount -t ext3 -o ro /dev/md0 /mnt"
	mntproc = os.popen(mntcmd)
	if mntproc.close() == 0:
		print "WE GOT IT: %s" %(mdcmd)
		sys.exit()
	else:
		print "Nope!"
		mdcmd = "mdadm --stop /dev/md0"
		mdproc = os.popen(mdcmd)