• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

large storage with software RAID

Looking into the lz4 compression, seems great for things like logs but what about other files types? music, video, software, VMs based OS installs, etc. What systems support this as freenas being 9.1 does not?

Edit: Sorry i am wrong 9.1 has got lz4 compression even how its only ZFS 28. Would the built in ZFS support for lz4 compression be better?
 
Last edited:
stenrulz said:
Also, any recommendations for freenas and a 16-24 port SAS HBA card? If i am going to use ZFS RAIDZ then i think i should not be using hardware as they are not passing all into to the software layer such as IDs, SMART info, etc.
Click to expand...

I use 2 x HP SAS Expanders in my 2 stand alone server.. works great and good quality.. also good price :) i can recommend! :)
 
WestSidaz said:
I use 2 x HP SAS Expanders in my 2 stand alone server.. works great and good quality.. also good price :) i can recommend! :)
Click to expand...

Do you not get lower speed due to using the Expanders ? Also, what is the HBA that the Expanders connect to?
 
WestSidaz said:
Both servers has LSI MegaRAID SAS 9211-8i cards.. why would u get lower speeds with expanders?
Click to expand...

With high port expanders it's totally possible to not be able to get full bandwidth on all drives at a time. I mean 130 to180 MB/s * X drives may be greater than the full bandwidth of the link.

Edit: Although for the most part the only time you would need that is if you were rebuilding an array containing all drives or checking the consistency of all drives.
 
Last edited:
I am trying to keep rebuild times lowish but still have a decent size array. Does anyone know if LSI 2308 support any SAS expanders?

Also, looking at the Intel RES2SV240. The intel website states "Eight SFF8087 SAS/SATA connectors" but i can only see 6 in the image, where are the other 2?
 
stenrulz said:
Do you not get lower speed due to using the Expanders ? Also, what is the HBA that the Expanders connect to?
Click to expand...

SAS expander aren't like the cheap SATA expanders. While there's limits they are much higher. A bunch of 7200 mechanical HDs will see good performance.
 
WestSidaz said:
Both servers has LSI MegaRAID SAS 9211-8i cards.. why would u get lower speeds with expanders?
Click to expand...

Are these cleanly doing JBOD? Do they present AHCI to the host? If not, how's is tagging support in the Linux and FreeBSD drivers?
 
stenrulz said:
Looking into the lz4 compression, seems great for things like logs but what about other files types? music, video, software, VMs based OS installs, etc. What systems support this as freenas being 9.1 does not?

Edit: Sorry i am wrong 9.1 has got lz4 compression even how its only ZFS 28. Would the built in ZFS support for lz4 compression be better?
Click to expand...

LZ4 is an extremly fast compression algorithm. It detects data that compress badly(like music and video), and hardly do anything with it. Because of this, you still get blazing fast speed. I would enable LZ4 as the default compression globally, its really that good!!
 
You must log in or register to reply here.
Back
Top