On Mon, Nov 04, 2002 at 03:55:13PM +0100, Patrick M. Hausen wrote: > But I need a holding disk at least as large as my largest FS to dump? > So if I have one 170 GB RAID I need one 170 GB holding disk?
No - you need a holding disk preferrably as big as your TWO largest disklist entries, which may be <= your largest FS. From "Using Amanda" ] Ideally, there should be enough holding disk space for the two largest ] backup images simultaneously, so one image can be coming into the holding ] disk while the other is being written to tape. If that is not practical, any ] amount that holds at least a few of the smaller images helps. > The customer won't like that ;-) Customers rarely like anything which costs them money :-) > Or is this what the chunksize parameter is for - taper will start when > the first chunk is completely written to the holding disk? No - chunksize merely specifies how big are the chunks the backup is split into on disk. Really only needed on older OS which have a relatively small limit (often 2GB) to the size of a single file. > In this case I'm sure a holding disk will speed up things quite a > bit even in my "pathological" case of only one big FS. No - a holding disk will only help you at all if it's at least as big as your two smallest disklist entries. Kindest regards, Niall O Broin
