hello, i recently setup a unraid server on version 4.3.3, I am curious as to what others are getting for transfer speeds when writing to the server disks from a Vista Machine. I am getting as low as 7MB and rarely above 14MB. Is this typical. Parity is/was enabled for my testing.

 

I'm not sure i have an issue, so i was wondering what people with a comparable setup are getting.

 

Network specs are cat5e cabling, gig switch, gig ports each side. confirmed both sides are running at a gig/full as well.

 

Vista SP1

4 gig ram

WD raptor disk.

(nothing else running at the time)

 

Unraid specs

Asus P5E-VM DO  (intel PCIe gig lan)

2 Gig Ram

All hard disks are 1Tb WD GP drives

 

 

Thanks

 

 

 

I am getting as low as 7MB and rarely above 14MB. Is this typical. Parity is/was enabled for my testing.

 

I think this is typical when writing large files.

In my environment, It will burst at up to 22MB/s but after the buffer cache fills up and the data starts being written

it will drop between 4-10MB/s.

If I do an rsync with --bwlimit, I can get a steady 10-14-16MB/s depending on conditions.

This is probably only because the network throughput is limited (on purpose with the bwlimit) thereby preventing all of the buffer cache from filling up.

I have 8GB of ram in my system.

Remember every write consists of a read(data), read(parity), XOR operation for old and new block, then write(data), write(parity)

Not sure if the order is 100% accurate, but the operations are what I'm trying to show.

good to know ,  thanks a lot,    im getting about 25 MB average pulling from server,  so im happy with that,