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[SOLVED] Dell SAS 6/iR: JBOD? - Page 2

post #11 of 19
Thread Starter 
UPDATE:


OK, bought the card and installed it. The computer (see sig.) POSTs normally, and the card lists the drives attached to it, so I do not see any SMBus issues (unlike my PERC 6/i).

Unfortunately, the card seems to interfere with the drive boot order in the system BIOS. The BIOS is set to boot from the system drive, yet if the system drive is connected to the onboard SATA controller, and the SAS 6/iR has at least one drive attached to it, the BIOS will NOT load the bootloader of the system drive.

If the system drive is attached to the SAS 6/iR, the BIOS will still not load the bootloader from the system disk.


EDIT:

OK, with the system booted I hot-attached one of my drives to it, and the mptsas driver detected it immediately. I then hot-attached three more drives and the system detected those too. Looks like:

a) The SAS 6/iR does support pass-through/JBOD for those disks not part of an array.
b) The boot issues are BIOS-related.

Since hot-attaching drives every reboot isn't desirable, it looks like I'll have to flash the card with a different BIOS.
Edited by parityboy - 7/8/11 at 5:29pm
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post #12 of 19
Thread Starter 
UPDATE 2:

OK, it now allows the system to boot without needing to hot-attach the drives. Here's how:

1) During POST, press CTRL-C to get into the BIOS of the SAS 6/iR.
2) Hit Enter to select the first adapter listed. It will read the NVRAM settings
3) Move the highlight until it hits the value for "Boot support" (should be highlighted already). Press either - or + until the value reads "Disabled".
4) Hit Esc and save your changes, then hit Esc again to get out of the BIOS and reboot.

Bear in mind that if you have more than one SAS 6/iR, you will have to do this for all of them. Good thing is, there's no need to flash the card at all (not that I can see, anyway).

The OS (in this case Ubuntu 10.04 LTS) will now boot from the system disk (which is attached to the on-board SATA adapter). Once booted, the mptsas driver will have detected the card and the drives attached to it, and present them to the OS.

So, just to formally confirm, the SAS 6/iR is a perfectly good, cheap and JBOD-capable 8-port SAS adapter. Of course the next question is: does it work with SAS expanders? biggrin.gif
Edited by parityboy - 7/8/11 at 7:13pm
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post #13 of 19
I realize I'm replying to a thread that's over 2 years old, and that the equipment might not even be around for you anymore, however googling has turned up a very limited set of results.

Were you ever able to get the SAS expander to work with the 6/iR in JBOD?
post #14 of 19
Quote:
Originally Posted by parityboy View Post

UPDATE 2:

OK, it now allows the system to boot without needing to hot-attach the drives. Here's how:

1) During POST, press CTRL-C to get into the BIOS of the SAS 6/iR.
2) Hit Enter to select the first adapter listed. It will read the NVRAM settings
3) Move the highlight until it hits the value for "Boot support" (should be highlighted already). Press either - or + until the value reads "Disabled".
4) Hit Esc and save your changes, then hit Esc again to get out of the BIOS and reboot.

Bear in mind that if you have more than one SAS 6/iR, you will have to do this for all of them. Good thing is, there's no need to flash the card at all (not that I can see, anyway).

The OS (in this case Ubuntu 10.04 LTS) will now boot from the system disk (which is attached to the on-board SATA adapter). Once booted, the mptsas driver will have detected the card and the drives attached to it, and present them to the OS.

So, just to formally confirm, the SAS 6/iR is a perfectly good, cheap and JBOD-capable 8-port SAS adapter. Of course the next question is: does it work with SAS expanders? biggrin.gif

I know this is a really, really old thread, but I'd hug you for this if I could. Last time I dug through these settings I couldn't find anything for JBOD, looks like I was wrong. Cheers!
post #15 of 19
Quote:
Originally Posted by parityboy View Post

UPDATE 2:

OK, it now allows the system to boot without needing to hot-attach the drives. Here's how:

1) During POST, press CTRL-C to get into the BIOS of the SAS 6/iR.
2) Hit Enter to select the first adapter listed. It will read the NVRAM settings
3) Move the highlight until it hits the value for "Boot support" (should be highlighted already). Press either - or + until the value reads "Disabled".
4) Hit Esc and save your changes, then hit Esc again to get out of the BIOS and reboot.

Bear in mind that if you have more than one SAS 6/iR, you will have to do this for all of them. Good thing is, there's no need to flash the card at all (not that I can see, anyway).

The OS (in this case Ubuntu 10.04 LTS) will now boot from the system disk (which is attached to the on-board SATA adapter). Once booted, the mptsas driver will have detected the card and the drives attached to it, and present them to the OS.

So, just to formally confirm, the SAS 6/iR is a perfectly good, cheap and JBOD-capable 8-port SAS adapter. Of course the next question is: does it work with SAS expanders? biggrin.gif

Is it possible to boot from the SAS controller's attached SSD when the boot support is disabled?
I'm considering doing this, to see if it enables TRIM support.
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post #16 of 19
Quote:
Originally Posted by gijs007 View Post

Is it possible to boot from the SAS controller's attached SSD when the boot support is disabled?
I'm considering doing this, to see if it enables TRIM support.

Hello,

I realize this is a really old thread (as the last several people have mentioned when they post :-P ) but wanted to check, did you have any luck with TRIM support for SSDs when using the SAS 6/i in passthrough mode?

I've got a PERC 6/i in my system right now and need something with passthrough so I can use software RAID instead of HW RAID.

Thanks!
post #17 of 19
Quote:
Originally Posted by SnackMasterX View Post

Hello,

I realize this is a really old thread (as the last several people have mentioned when they post :-P ) but wanted to check, did you have any luck with TRIM support for SSDs when using the SAS 6/i in passthrough mode?

I've got a PERC 6/i in my system right now and need something with passthrough so I can use software RAID instead of HW RAID.

Thanks!
No, I couldn't get it to work.
Instead I've decided to ditch all the Dell hardware and switch to supermicro, they don't fool around with the chipset so I can actually use Intel's chipset raid which does support TRIM.
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post #18 of 19
Thanks for the quick response!

One of my friends recently gave me a Dell PowerEdge 2900 server which had a PERC 6/i and I want to use either ZFS or BTRFS to turn it into my home storage. Doing testing in some VMs now to see which one will best fit my needs.

I'll keep doing some more searching to find something that will allow TRIM support for SSDs in passthrough mode.

Thanks!
post #19 of 19
Here's another silly question, do you know if the SAS 6/iR will allow the host to access SMART data directly, or will I need some kind of utility for that?

If the SAS 6/iR won't present SMART data directly to host, there's zero point to me acquiring those cards.
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