Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
the system setup menu, the boot menu shows that freebsd90 is the first (and only) bootable hard drive. Yet when I try to install FreeBSD 9.0-R, FreeBSD ignores the hardware RAID and sees the two separate drives, instead of seeing a single logical drive. good lesson to NEVER use this pseudo-RAID interfaces and use gmirror instead. not only you can make more complex RAID setup, get higher performance from gmirror and be always able to access data independently of hardware RAID onboard which is just normal controller. Just don't use BIOS RAID ever. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
FreeBSD will use a hardware RAID device -only- if the particular type of RAID chip/chipset/controller is known to the included device drivers. do not use hardware RAID for such things as this is nothing else than normal controller and BIOS/driver support. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
From woj...@wojtek.tensor.gdynia.pl Sat May 19 06:51:00 2012 Date: Sat, 19 May 2012 13:48:18 +0200 (CEST) From: User Wojtek woj...@wojtek.tensor.gdynia.pl To: Robert Bonomi bon...@mail.r-bonomi.com cc: freebsd-questions@freebsd.org, te...@sunset.tx.net Subject: Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation FreeBSD will use a hardware RAID device -only- if the particular type of RAID chip/chipset/controller is known to the included device drivers. do not use hardware RAID for such things as this is nothing else than normal controller and BIOS/driver support. 'Male bovine excrement' applies. I used 'hardware RAID' because that is -precisely- how the OP described their equipment. And Dell does offer at least one such controller. That aside, my statement is entirely accurate, _as_written_, regardless of the hardwaare that the OP has. Now, I'll grant it is possible that you know more about the OP's equipment than I do, but _I_ will assume that the OP knows what they are talking bout, with regard to -their- hardware configuration. Further, I, personally, have a fairly similar Compaq machine, which has hardware RAID, with it's own BIOS (including configuration/setup screens). Oh, yes, FreeBSD _does_ recognize the raid volumes -- with NO RAID support whatsoever in the O/S itself. I run full-custom kernels with no loadable modules, I _know_ what capbilites are/aren't present. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
I used 'hardware RAID' because that is -precisely- how the OP described their equipment. unfortunately this is true - it is DESCRIBED as such. lie is standard tool in todays IT marketing. What are facts: - very few controllers actually have some RAID support. those usually have onboard RAM in substantial amount and preferably - battery backed. - unless you need RAID-5,6 or similar hardware cannot speed it up much. - gmirror/gstripe in FreeBSD is vastly superior to any RAID including true hardware ones - if configured properly. unless you treat single-process sequential read as measure of performance. even graid5 (from ports) is close to, or even outperform true hardware RAID, but CPU load is substantial. - RAID hardware does not allow any flexibility, like partitioning disks and using different RAID styles for parts. very useful. - with FreeBSD software RAID you will be able to access your data in every computer with SATA port. That's simple. And Dell does offer at least one such controller. Yes true. Actually all recently bought servers i have to manage are Dells (yes their 24-hour warranty replacement on place actually work!). And i always make sure no hardware RAID is present :), to get best performance. Actually i told Dell marketer i will be recommending hardware RAID solution for Dell when he prove it will actually outperform my software RAID10 setup with same amount of same disks. Still not proved ;) Of course you have to properly configure both hardware and software RAID. The cases where true hardware RAID may help is it's battery backup write-buffer that consume forced syncs (database commits etc) when they are common. still if it is an issue it means than database software is really badly designed if it have to sync constantly. But if there is no choice, today there are simple solutions like small-size SLC flash drive or battery backed ramdisk in extreme cases. Further, I, personally, have a fairly similar Compaq machine, which has hardware RAID, with it's own BIOS (including configuration/setup screens). what is the chip that you say it is hardware RAID? I dare to not believe you, but possibly you are right. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
I created a RAID 1 drive in a Dell Optiplex 755, using the internal RAID controller and two 160GB drives, naming the logical drive freebsd90. Within the system setup menu, the boot menu shows that freebsd90 is the first (and only) bootable hard drive. Yet when I try to install FreeBSD 9.0-R, FreeBSD ignores the hardware RAID and sees the two separate drives, instead of seeing a single logical drive. Is there a way to get FreeBSD 9.0 to recognize the Optiplex 755 RAID 1 drive? If not, can I just install FreeBSD to one of the drives and expect the hardware RAID to mirror it properly? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
From owner-freebsd-questi...@freebsd.org Fri May 18 15:12:56 2012 Date: Fri, 18 May 2012 14:58:26 -0500 (CDT) From: tess lamont te...@sunset.tx.net To: freebsd-questions@freebsd.org Subject: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation I created a RAID 1 drive in a Dell Optiplex 755, using the internal RAID controller and two 160GB drives, naming the logical drive freebsd90. Within the system setup menu, the boot menu shows that freebsd90 is the first (and only) bootable hard drive. Yet when I try to install FreeBSD 9.0-R, FreeBSD ignores the hardware RAID and sees the two separate drives, instead of seeing a single logical drive. FreeBSD will use a hardware RAID device -only- if the particular type of RAID chip/chipset/controller is known to the included device drivers. From some casual searching on the 'net, I can't find anything that indicates -what- RAID controller is in the Optiplex 755. IF you know, or can find that info, check: http://www.freebsd.org/releases/9.0R/hardware.html#DISK to see if that disk controller is listed. If yes, it should 'just work'. If it is not listed, you're out of luck. If you can't in the controller informtion, you'll need to post something that includes the boot-up messages showing what FreeBSD found for disks and disk controllers. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Optiplex 755 RAID 1 logical drive configuration ignored by FreeBSD 9.0-R installation
On Fri, 18 May 2012, tess lamont wrote: I created a RAID 1 drive in a Dell Optiplex 755, using the internal RAID controller and two 160GB drives, naming the logical drive freebsd90. Within the system setup menu, the boot menu shows that freebsd90 is the first (and only) bootable hard drive. Yet when I try to install FreeBSD 9.0-R, FreeBSD ignores the hardware RAID and sees the two separate drives, instead of seeing a single logical drive. See graid(8). If it supports that controller, FreeBSD should be able to boot from the array and use it. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
