Another HD Toolbox Question

[512k]

When it come to an expanded amiga aca1233n card wise aka 68030 128mb ram

I courious about 2 options

1 Would improving the block size to 4090 hurt and what are the benfits.

2. I heard of adding more buffers on expanded amiga so what is recommended
I know the default is 150

When you read up on amiga stuff like this it peak my curioursity.Also touching these would be unwise on an unexpanded amiga due to ram?

[Daedalus]

Increasing the block size is a good thing if you're using the FFS file system due to the way it works, but if you're using SFS or PFS you should leave it at 512. Under FFS, a larger blocksize can significantly increase the speed of transfers. 4096 is a good value, and I believe others have found that improvements can still be had up to 16384 bytes.

There are a couple of minor factors to be aware of when increasing the block size however:
First, a block is the smallest unit of size that can be used for storing files, and everything takes up a whole number of blocks. That means that a 20-byte file will take 1 block of space, whether that's 512 bytes or 16KB. Similarly, a 4,200-byte file will take nine 512-byte blocks of space (4,608 bytes), or two 4,096-byte blocks (8192 bytes). So larger block sizes mean slightly more wasted space on the partition, mainly if you have a lot of small files.
Second, the Buffers parameter is the number of blocks to reserve in RAM as a sort of cache for that partition. If you have 100 buffers set with a 512-byte block size, that will use up ~50KB of RAM. If you have 100 buffers set with a 16KB block size, that will use up ~1.6MB of RAM. With lots of fast RAM, that's not a problem, but you might have difficulty using the system without fast RAM. So decreasing the number of buffers might be a good idea with large block sizes.

As for a good value for buffers, they also make a significant different to access speeds, but there's a diminishing returns effect that means adding more than maybe 150-200 has little or no effect. From memory I think all mine are set to 150.

[512k]

Thanx for the stunning post Daedalus nice source of information.Also look like i being doing thing right

[daxb]

The values for block size and buffer size Daedalus mentioned are depending on the used filesystem. One buffer can mean 512 bytes, 1024 bytes or size = buffer x block size. Also the amount/limit of buffer is different. So make sure how the used filesystem works. In most cases reading the docs should give the answers.