Can I, with a h700 sitting in a r710, create 6 individual raid 0 drives where each raid 0 consists of 1 drive? This maybe seems like an option given the lack of JBOD support.
13 Replies
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Mace
OP
If only 1 drive...then you do not even need RAID....you literally took out the "R" (Redundancy) and gave your server AIDs....and sentence it to death when HDDs fail.
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What do you meant lack of JBOD support ?
The H700 is a RAID controller card for Internal HDD within the R710.
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Pimiento
OP
I want to run FreeNAS on this server and to use ZFS to manage my redundancy. As it stands, the h700 wont do passthrough/JBOD, so, to get around that i was thinking of creating 6 raid 0 arrays that each have 1 disk.
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Poblano
OP
I'm not sure about that controller but I've used JBOD with a dell r330 and r510. Go into the BIOS and take the disks out of the RAID and set them up as normal disks. I did this to use storage spaces so I could thin provision the servers.
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Anaheim
OP
i would try openmediavault i had this work great on dell T330 and T110 II
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Thai Pepper
OP
You can indeed do exactly this.
Benefit of using H700 > Perc6i = >2TB Disks supported, as well as 4k sector drives. Both use an NU209 battery but the H700 health monitoring of its battery status is much b
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Habanero
OP
The H700 is an LSI 2108-based card, which does not have an initiator target/HBA firmware available, so it cannot be used to pass through the drives in a JBOD mode.
Any sort of RAID configuration on ZFS introduces problems because of the processing done by the raid card interfering with ZFS.
What you need is an LSI 2008, 2308 or 3008 with an IT/HBA mode firmware installed
https://forums.servethehome.com has all the information you're looking for in this case.
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Mace
OP
You can absolutely do that. You'll have issues with "Direct" version of Storage Spaces as it won't accept RAID BusType but good news - you can patch S2D accepted bus types with either a registry hack or our special patch driver (this one works always, registry patch can be tricky to use). See:
https://www.starwindsoftware.com/blog/resolving-enable-clusters2d-bus-type-support-issue-on-some-storage-controllers
Just make sure you don't use write back cache (controller and / or disk) with your single disk RAID0 groups as keeping WBC will have disastrous results: Storage Spaces assumes all writes are "atomic".
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Mace
OP
philoliveira wrote:
I want to run FreeNAS on this server and to use ZFS to manage my redundancy. As it stands, the h700 wont do passthrough/JBOD, so, to get around that i was thinking of creating 6 raid 0 arrays that each have 1 disk.
You already have hardware adapter to provide RAID....why do you want to "downgrade" to use software RAID instead ?
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Pimiento
OP
ZFS is an upgrade to hardware raid. You should really go do some research on why it is a much better option over hardware raid in most cases.
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Mace
OP
philoliveira wrote:
ZFS is an upgrade to hardware raid. You should really go do some research on why it is a much better option over hardware raid in most cases.
First of all...apologies as I did not realize that this is an old post, I merely replied as someone spiced up my response.
ZFS like NTFS etc is just a a file system....maybe more robust FS.....in most NAS and/or SAN, some file systems may play a crucial RAID role but not in the case of servers with built-in RAID adapters.
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In the case of servers with RAID adapters, putting HDD or SSD into unRAID or multiple RAID 0 then using ZFS to RAID is like the case of Fake-RAID or software RAID where the Motherboard passes the RAID or storage redundancy to the OSe or Software in the OSe. Any issues to the OSe or software in the OSe, all the RAID configuration is gone.
Thats why in cases of Dell servers with PERC cards, you can access the RAID config at BIOS or POST (pre-OS boot up)....which means that the RAID drives is not dependent on the OS installed or any software within the OS either. Dell PERC may also saves a copy of the RAID configuration on the HDD/SSD.
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Pimiento
OP
Adrian,
ZFS isn't just a file system, it is meant to go hand in hand with zraid which has many advantages (and some disadvantages) to standard raid. Also it is not dependent on the OS like you suggested, if freenas OS has issue for example you can scan and import raid into new OS, in most cases. It's an entirely different philosophy to RAID, but demands direct access to disks to work properly, individual raid 0's are not ideal.
Old post I know just stumbled upon it seeing if there was a firmware hack for h710 to allow jbod mode.
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Pimiento
OP
Did this work? I have a R700 in a Dell R515 (Dual AMD not many around) and I was thinking along the same line as, making all drives apear single (Raid 0 each drive) then using zfs or say FreeNAS to pool them... Did you ever get around doing this option?
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Paul Murdock said:
The only item I haven't figured out yet is the LED control to signal when certain disks have problems
Click to expand...
zed is your best friend here. It is impossible that you face a situation when hdd X have a problem, and zfs pool will not be able to see this problem( => zed will send you a mail). Also you can use the script from this URL:
https://calomel.org/zfs_health_check_script.html
, who cand check your pool for this:
- Health - Check if all zfs volumes are not degraded or broken in any way.
- Capacity - Make sure all pool capacities are below 80% for best performance.
- Errors - Check the columns for READ, WRITE and CKSUM (checksum) drive errors.
- Scrub Expired - Check if all volumes have been scrubbed in at least the last 8 days.
And also the hddtemp can check your hdd's temperature. With some scripting skills, you can send emails alarms if some higher temperature is in your server.
Good luck, and do not waste your time with ... some simple LEDs
Sours: https://forum.proxmox.com/threads/dell-r810-perc-h700-zfs-for-replication.53159/
This is my first foray with flash raid controllers. I'm trying to get my H700 to operate in IT mode so that UNRAID or FREENAS can see the drives individually.
Last night I tried flashing the files I found in previous threadbut it's not in IT mode. I'm not sure if there are different files I should be using or another setting that needs to be set after the flash but I didn't see anything obvious on the controller setup screen.
Odd thing was MEGAREC would freeze in the R510 when I ran any command including "-adplist". I could only get it to work inside of my R610.
EDIT: Adding details
Files used: see "previous thread" above for link to thread, direct link: https://bigxor.com/H700.zip
Steps used:
When that didn't work, I also tried following:0) Identify the card you want to flash
megarec -adplist
1) Save your current SBR to backup SBR just in case...
megarec -readsbr 0 backup_h700.sbr
2) Reflash the SBR with the version you want:
megarec -writesbr 0 sbrh700.bin
3) Empty the BIOS:
megarec -cleanflash 0
4) Reboot the computer and boot from the flash drive again. Your RAID card BIOS will not load. That is normal, you just wiped it clean.
5) Flash the Firmware back:
megarec -m0flash 0 0004_del.romClick to expand...
After that didnt work, I went out and got new drivers from LSI for the card. 12.15.0-0239_MR_2108_SAS_FW_2.130.403-4660 was the current firmware that came with mr2108fw.rom. I then repeated the above processes using this firmware. All four times everything flashed correctly and executed with "success".
- Boot PC to USB DOS
- Megarec -adplist
- Megarec -cleanflash 0
- Reboot PC back to USB DOS
- Megarec -m0flash 0 0004_del.rom
- Megarec -writesbr 0 sbrh700.bin
- Megarec -writespd 0 spdh700.bin
- Reboot
Click to expand...
Sours: https://forums.servethehome.com/index.php?threads/dell-h700-cross-flashed-to-it-mode.12130/
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