My perfect harddisk setup is like this:

1x small but fast SSD is there for Windows + programs (64GB is enough)

2x large but slow mirrored harddisks are there to hold the valuable data.

Separating programs and data is always a good idea, because you can reset the programs without resetting the data 😉

While also having a slight performance increase when accessing both at the same time 😉 (programs -load-> data)

With Acronis True image i regularly backup the SSD to the larger mirrored disks…

to speed up things even more go for PrimoCache: RAM + SSD Cache http://www.romexsoftware.com/en-us/primo-cache/download.html

It’s currently in Beta phase but looks good!

2x WDC WD20EFRX-68AX9

primocache benchmark

 

Let’s see how this compares to older version of OSX 10.6.8: There you also have a disk-management-utility that let’s you create HFS+ RAID1

i have 2x 2TB WDC WD20EARX-00PASB0 installed.

osx 10.6.8 diskutility raid1

# =========== SEQUENTIAL WRITING: 1024x1024k

mactower:RAID1DATA$ time dd if=/dev/zero bs=1024k of=tstfile count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 17.131320 secs (62677121 bytes/sec)

62677121/1024/1024
59.77MB/Sec writing -> ARGH, that's slow!

real	0m17.243s
user	0m0.002s
sys	0m1.081s

# =========== SEQUENTIAL READING:

1073741824 bytes transferred in 0.505288 secs (2125009025 bytes/sec)
mactower:RAID1DATA $ dd if=tstfile bs=1024k of=/dev/null count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 0.515659 secs (2082270703 bytes/sec)
mactower:RAID1DATA $ dd if=tstfile bs=1024k of=/dev/null count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 0.509585 secs (2107090131 bytes/sec)
mactower:RAID1DATA $ dd if=tstfile bs=1024k of=/dev/null count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 0.509653 secs (2106809204 bytes/sec)

2107090131/1024/1024
2009MB/Sec -> Can not be 😀 Some RAM-Caching going on i guess 😀

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