# Another test case on a 5U JackRabbit

This is the other 5U JackRabbit unit we are building for the customer.
Single thread read of an large file, no caching. This is spinning rust (e.g. hard disk). This uses 2TB drives while the other unit uses 1TB drives. The theoretical maximum we could pull data off these units the way they are arranged now is 4.68 GB/s with these particular drives.

[root@jr5-2 ~]# dd of=/dev/null if=/data/big.file  ...
1024+0 records in
1024+0 records out
137438953472 bytes (137 GB) copied, 29.9243 seconds, 4.6 GB/s


Unit has less than 128 GB ram.