Artemis1121
Cadet
- Joined
- Apr 18, 2015
- Messages
- 4
just for you to see what my motivation is:
Current NAS:
- Marvell Sheevaplug (1.2GHZ Kirkwood ARM SoC, 512MB RAM, USB2)
- 3 USB Hubs
- 19 USB harddisks (1-3TB each, 37.5TB total)
- replaced all the single power supplies with an ATX-Power-Supply
- debian testing
- 15-30MB/s
- no raid
- no encryption
- no redundancy
Trying to achieve:
- 100MB/s
- encryption
- raidz1/raidz2
After searching and comparing possible options (and waiting for D-1540 just to see that a board costs 1000€+), i believe that a c-2750 would suit my needs best.
But i have some questions:
1) ASRock C2750D4I or Supermicro A1SA7-2750F
i read, that the ASRock board has problems with its se9230 sata controller, and that it is propably a driver issue. since i will need 9 or 10 drives, its not an option to use only the other ports.. on the other hand its a difference of 150€.. in the german part of this forum the asrock board is recommended without mentioning this problem. has this problem been solved?
2) ASRock C2750D4I or Supermicro A1SA7-2750F
since my system will idle most of the time, does anybody know idle power consumption of those builds?
read something like 19w for a simple c2750, 26w for the asrock(caused by the marvell controllers), but found no info about the supermicro with 16xsata..
3) 8gb or 16gb
1-2 simultaneous users, most time only reading, mostly large files.. are 16gb really necessary? zfs uses a lot ram, but my current system works with 512mb.. that just feels wrong ^^
4) Seagate Archive or WD Green
Any know disadvantages with the seagate archive harddisks? partially overwriting tracks doesnt seem a good idea.. better not joining the public beta test or does anybody have positive experience with such a raid?
5) raidz1/raidz2
important data is backuped on additional harddisks, dvds or both.
i have lost disks and data in the past. happens..
read a lot about it, but is raidz2 really sooooo important?
is it simple to upgrade a raidz1 to raidz2, if i decide to do so later?
6) spindown
in my current system i use hd-idle to spindown the disks after 10minutes without use.. will the disks of a freenas raid automatically spindown? i even read that it is strongly advised not to spindown the drives, is this correct?
7) overhead
my current drives are formatted with ext3 and the option largefile4.. on a 1TB drive this gives me 932GB usable space compared to 917GB without largefile4.
what is the filesystem overhead of zfs?
Any help solving these questions would be great!
Thank You!
PS: you dont need to say anything about my current NAS, just laugh a little bit or scream or both! ^^
Current NAS:
- Marvell Sheevaplug (1.2GHZ Kirkwood ARM SoC, 512MB RAM, USB2)
- 3 USB Hubs
- 19 USB harddisks (1-3TB each, 37.5TB total)
- replaced all the single power supplies with an ATX-Power-Supply
- debian testing
- 15-30MB/s
- no raid
- no encryption
- no redundancy
Trying to achieve:
- 100MB/s
- encryption
- raidz1/raidz2
After searching and comparing possible options (and waiting for D-1540 just to see that a board costs 1000€+), i believe that a c-2750 would suit my needs best.
But i have some questions:
1) ASRock C2750D4I or Supermicro A1SA7-2750F
i read, that the ASRock board has problems with its se9230 sata controller, and that it is propably a driver issue. since i will need 9 or 10 drives, its not an option to use only the other ports.. on the other hand its a difference of 150€.. in the german part of this forum the asrock board is recommended without mentioning this problem. has this problem been solved?
2) ASRock C2750D4I or Supermicro A1SA7-2750F
since my system will idle most of the time, does anybody know idle power consumption of those builds?
read something like 19w for a simple c2750, 26w for the asrock(caused by the marvell controllers), but found no info about the supermicro with 16xsata..
3) 8gb or 16gb
1-2 simultaneous users, most time only reading, mostly large files.. are 16gb really necessary? zfs uses a lot ram, but my current system works with 512mb.. that just feels wrong ^^
4) Seagate Archive or WD Green
Any know disadvantages with the seagate archive harddisks? partially overwriting tracks doesnt seem a good idea.. better not joining the public beta test or does anybody have positive experience with such a raid?
5) raidz1/raidz2
important data is backuped on additional harddisks, dvds or both.
i have lost disks and data in the past. happens..
read a lot about it, but is raidz2 really sooooo important?
is it simple to upgrade a raidz1 to raidz2, if i decide to do so later?
6) spindown
in my current system i use hd-idle to spindown the disks after 10minutes without use.. will the disks of a freenas raid automatically spindown? i even read that it is strongly advised not to spindown the drives, is this correct?
7) overhead
my current drives are formatted with ext3 and the option largefile4.. on a 1TB drive this gives me 932GB usable space compared to 917GB without largefile4.
what is the filesystem overhead of zfs?
Any help solving these questions would be great!
Thank You!
PS: you dont need to say anything about my current NAS, just laugh a little bit or scream or both! ^^