def writeDiskBlock(id, block_no, write_data):
if not diskPhysical.diskMap.has_key(id):
raise Exception("Error : Disk does not exist")
disk = diskPhysical.diskMap[id]
if disk.numBlocks < block_no + 1:
raise Exception("Error : Invalid block number")
disk.commandList.append(("writeDiskBlock", block_no, write_data))
print "Finding disk block..."
virtual_block_no = getVirtualDiskNo(disk.patches, block_no)
diskPhysical.writePhysicalBlock(virtual_block_no, write_data)
delta = disk.numBlocks / 2
block_replica_disk = (block_no +
delta) if block_no < delta else (block_no - delta)
virtual_replica_block_no = getVirtualDiskNo(disk.patches,
block_replica_disk)
curr_replica = diskPhysical.getBlockReplica(virtual_block_no)
if curr_replica == -1 or curr_replica != virtual_replica_block_no:
diskPhysical.setBlockReplica(virtual_block_no,
virtual_replica_block_no)
diskPhysical.setBlockReplica(virtual_replica_block_no,
virtual_block_no)
print "Virtual replica block no : ", str(
diskPhysical.getBlockReplica(virtual_block_no))
diskPhysical.writePhysicalBlock(
diskPhysical.getBlockReplica(virtual_block_no), write_data)
print "Written disk block..."
def writeDiskBlock(id, block_no, write_data):
if not diskPhysical.diskMap.has_key(id):
raise Exception("Error : Invalid disk id")
disk = diskPhysical.diskMap[id]
if disk.numBlocks < block_no + 1:
raise Exception("Error : Invalid block number")
disk.commandList.append(("writeDiskBlock", block_no, write_data))
print "Finding disk block..."
print "Virtual disk no : ", getVirtualDiskNo(disk.patches, block_no)
diskPhysical.writePhysicalBlock(getVirtualDiskNo(disk.patches, block_no),
write_data)
print "Written disk block..."
def writeBlock(block_no, write_data):
diskPhysical.writePhysicalBlock(block_no, write_data)