Hi,
When I create a volume of bigger size for eg. 640 MB
Now since allocation units is fixed at 65536. Therefore Bytes per allocation unit becomes 640 * 2 ^20 / 65536 = 10 * 2^10 (10K) (approx) That means if i give even one allocation block for each file i am physically giving him 10k space even though file may be some 100 bytes which results in space wastage. I also believe there is no solution because each file should have atleast one allocation block and each file should start from a new allocation block . I am just wondering if I am right??? Or there is some alternative!! Waitng for ur comments. regards Biswaroop
The difference between sunrise and sunset lies in the freshness of your eyes. --Bisban
Hi Biswaroop, You're right - for larger images a larger allocation block size is necessary (limitation of HFS). The only 'alternative' would be to use HFS+ and a smaller allocation block size.
-Nandini
----- Original Message ----- From: "Biswaroop(External)" biswaroopb@integramicro.com To: hfs-user@lists.mars.org Sent: Tuesday, April 30, 2002 1:00 PM Subject: [hfs-user] Problem of Allocation Block Size
Hi,
When I create a volume of bigger size for eg. 640 MB
Now since allocation units is fixed at 65536. Therefore Bytes per allocation unit becomes 640 * 2 ^20 / 65536 = 10 * 2^10 (10K) (approx) That means if i give even one allocation block for each file i am physically giving him 10k space even though file may be some 100 bytes which results in space wastage. I also believe there is no solution because each file should have atleast one allocation block and each file should start from a new allocation block . I am just wondering if I am right??? Or there is some alternative!! Waitng for ur comments. regards Biswaroop
The difference between sunrise and sunset lies in the freshness of your eyes. --Bisban
Hi Biswaroop,
You're right; HFS limits the number of allocation blocks to be somewhere between 2^31 and 2^32 at best, which forces allocation block sizes to get larger and larger as the disk size goes up. This problem, and the resulting waste of space, was one of the factors that drove the development of HFS+ which can work with much smaller allocation blocks than HFS for a given volume size.
-Patrick.
On Tuesday, April 30, 2002, at 04:00 AM, Biswaroop(External) wrote:
Hi,
When I create a volume of bigger size for eg. 640 MB
Now since allocation units is fixed at 65536. Therefore Bytes per allocation unit becomes 640 * 2 ^20 / 65536 = 10 * 2^10 (10K) (approx) That means if i give even one allocation block for each file i am physically giving him 10k space even though file may be some 100 bytes which results in space wastage. I also believe there is no solution because each file should have atleast one allocation block and each file should start from a new allocation block . I am just wondering if I am right??? Or there is some alternative!! Waitng for ur comments. regards Biswaroop
The difference between sunrise and sunset lies in the freshness of your eyes. --Bisban
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Biswaroop(External) -
Entwicklung -
Patrick Dirks