Re: Software RAID guidance
Robert Fitzpatrick wrote: I have an old NT4 PIII here that has a pair Adaptec Array1000 Family controllers with 2 pairs of identical drives on one of them (2 IBM 9GB and 2 Seagate 35GB). From what I googled, *nix does not support the controller, so I have removed the RAID arrays and loaded FreeBSD 6.0 onto the two IBM drives. Now, I wanted to mirror the other two for data and looking for guidance as to whether it is first of all suited for software RAID and if so, CCD or vinum. I am contemplating vinum because the handbook mentions CCD is when cost is the important factor and for me, is reliability. What would someone suggest? If vinum, one thing I don't quite understand is do I create the partitions to be used in the device? There doesn't seem to be a man for gvinum and the link to it in the handbook section 19.6.1 is broken. Hi Robert, I use gmirror(8) to setup RAID 1 volumes. I've used it successfully with IDE, SCSI and SATA drives. It is very simple to setup and administration is easy. If you only need RAID 1, then you should try it out. Should you need RAID 5 and/or a fully fledged volume manager, then vinum is the way. I also wrote a document on gmirror(8) setup. If you're interested, I can share it with you. David FYI: man page URLs gmirror(8) http://www.freebsd.org/cgi/man.cgi?query=gmirrorapropos=0sektion=0manpath=FreeBSD+6.0-RELEASE+and+Portsformat=html vinum(4) http://www.freebsd.org/cgi/man.cgi?query=vinumapropos=0sektion=0manpath=FreeBSD+6.0-RELEASE+and+Portsformat=html -- David Robillard UNIX systems administrator, CISSP Montreal: +1 514 966 0122 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
Robert Fitzpatrick wrote: I have an old NT4 PIII here that has a pair Adaptec Array1000 Family controllers with 2 pairs of identical drives on one of them (2 IBM 9GB and 2 Seagate 35GB). From what I googled, *nix does not support the controller, so I have removed the RAID arrays and loaded FreeBSD 6.0 onto the two IBM drives. Now, I wanted to mirror the other two for data and looking for guidance as to whether it is first of all suited for software RAID and if so, CCD or vinum. I am contemplating vinum because the handbook mentions CCD is when cost is the important factor and for me, is reliability. What would someone suggest? If vinum, one thing I don't quite understand is do I create the partitions to be used in the device? There doesn't seem to be a man for gvinum and the link to it in the handbook section 19.6.1 is broken. Just to give you another option. You can support RAID1 using atacontrol to just make two disk into a RAID. Plenty of posts in the archive with more info. As an outsider (i.e. without any RAID) this option always seemed the simplest. No doubt other with experience can tell you the relative merits of atacontrol vs gmirror. --Alex ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
On Fri, 2006-05-05 at 00:37 +0100, Alex Zbyslaw wrote: Robert Fitzpatrick wrote: I have an old NT4 PIII here that has a pair Adaptec Array1000 Family controllers with 2 pairs of identical drives on one of them (2 IBM 9GB and 2 Seagate 35GB). From what I googled, *nix does not support the controller, so I have removed the RAID arrays and loaded FreeBSD 6.0 onto the two IBM drives. Now, I wanted to mirror the other two for data and looking for guidance as to whether it is first of all suited for software RAID and if so, CCD or vinum. I am contemplating vinum because the handbook mentions CCD is when cost is the important factor and for me, is reliability. What would someone suggest? If vinum, one thing I don't quite understand is do I create the partitions to be used in the device? There doesn't seem to be a man for gvinum and the link to it in the handbook section 19.6.1 is broken. Just to give you another option. You can support RAID1 using atacontrol to just make two disk into a RAID. Yes, I saw mention of atacontrol somewhere in the handbook, the drives all SCSI. It seems atacontrol only addresses IDE? Excuse my ignorance on the subject of ATA vs SCSI :/ files# atacontrol list ATA channel 0: Master: acd0 CD-ROM 50X/10 ATA/ATAPI revision 0 Slave: no device present ATA channel 1: Master: no device present Slave: no device present -- Robert ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
I have been uable to get vinum to work under 6.0. I'm no expert though. Vinum became gvinum in 6.0 and is implemented using geom. Recently the gvinum man page has been updated and it available in 6.1 RC-1. I think if you want mirroring only you should consult the geom pages. It seems as though geom is the way of the future but does not currently support R5 which is what I was looking for. Somewhere out there is a pretty comprehensive set of iozone benchmarks comparing linux and BSD software Raid. Ah found it: http://www25.big.jp/~jam/filesystem/old/ This might give you some ideas. On Thu, 4 May 2006, Robert Fitzpatrick wrote: I have an old NT4 PIII here that has a pair Adaptec Array1000 Family controllers with 2 pairs of identical drives on one of them (2 IBM 9GB and 2 Seagate 35GB). From what I googled, *nix does not support the controller, so I have removed the RAID arrays and loaded FreeBSD 6.0 onto the two IBM drives. Now, I wanted to mirror the other two for data and looking for guidance as to whether it is first of all suited for software RAID and if so, CCD or vinum. I am contemplating vinum because the handbook mentions CCD is when cost is the important factor and for me, is reliability. What would someone suggest? If vinum, one thing I don't quite understand is do I create the partitions to be used in the device? There doesn't seem to be a man for gvinum and the link to it in the handbook section 19.6.1 is broken. Thanks in advance. -- Robert ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
Robert Fitzpatrick wrote: I have an old NT4 PIII here that has a pair Adaptec Array1000 Family controllers with 2 pairs of identical drives on one of them (2 IBM 9GB and 2 Seagate 35GB). From what I googled, *nix does not support the controller, so I have removed the RAID arrays and loaded FreeBSD 6.0 onto the two IBM drives. Now, I wanted to mirror the other two for data and looking for guidance as to whether it is first of all suited for software RAID and if so, CCD or vinum. I am contemplating vinum because the handbook mentions CCD is when cost is the important factor and for me, is reliability. What would someone suggest? If vinum, one thing I don't quite understand is do I create the partitions to be used in the device? There doesn't seem to be a man for gvinum and the link to it in the handbook section 19.6.1 is broken. Thanks in advance. Unlike what some seem to be claiming, I *have* been able to use gvinum on 6.X --- the documentation for vinum was helpful, you just put a g in front of the commands; quid pro quo, a few things in vinum aren't carried over into gvinum, but it's basically the same stuff (thanks Lukas, thanks Grog, etc.). I did have some system instability during my trial, though; I've put it down to a bad IDE HDD (because it gave issues when not part of a gvinum plex as well), but I didn't give it a serious amount of testing. As for the handbook, you seem to be correct. You might file a doc PR --- they'd probably appreciate having the opportunity to fix this. However, I do find gvinum(8) on my box Kevin Kinsey ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
On Thu, 2006-05-04 at 19:59 -0400, Ian Jefferson wrote: I think if you want mirroring only you should consult the geom pages. Great, I believe I have this setup right. I'm not sure what the fdisk issue may be with the message 'fdisk: Geom not found', but all looks to have setup properly. Now, just to have a clear understanding, what is the purpose of /dev/mirror/datas1c as it is not used in creating the mirror it seems? files# geom mirror label -v -s 35000 data /dev/da2 /dev/da3 Metadata value stored on /dev/da2. Metadata value stored on /dev/da3. Done. files# gmirror load files# fdisk -vBI /dev/mirror/data *** Working on device /dev/mirror/data *** parameters extracted from in-core disklabel are: cylinders=4462 heads=255 sectors/track=63 (16065 blks/cyl) Figures below won't work with BIOS for partitions not in cyl 1 parameters to be used for BIOS calculations are: cylinders=4462 heads=255 sectors/track=63 (16065 blks/cyl) Information from DOS bootblock is: 1: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 71681967 (35000 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 365/ head 254/ sector 63 2: UNUSED 3: UNUSED 4: UNUSED fdisk: Geom not found files# ls -l /dev/mirror/ total 0 crw-r- 1 root operator0, 127 May 4 20:48 data crw-r- 1 root operator0, 110 May 4 20:43 datas1 crw-r- 1 root operator0, 117 May 4 20:43 datas1a crw-r- 1 root operator0, 118 May 4 20:43 datas1c files# bsdlabel -wB /dev/mirror/datas1 files# newfs -U /dev/mirror/datas1a /dev/mirror/datas1a: 35001.0MB (71681948 sectors) block size 16384, fragment size 2048 using 191 cylinder groups of 183.77MB, 11761 blks, 23552 inodes. with soft updates super-block backups (for fsck -b #) at: 160, 376512, 752864, 1129216, 1505568, 1881920, 2258272, 2634624, 3010976, 3387328, 3763680, 4140032, 4516384, 4892736, 5269088, 5645440, 6021792, 6398144, 6774496, 7150848, 7527200, 7903552, 8279904, 8656256, 9032608, 9408960, 9785312, 10161664, 10538016, 10914368, 11290720, 11667072, 12043424, 12419776, 12796128, 13172480, 13548832, 13925184, 14301536, 14677888, 15054240, 15430592, 15806944, 16183296, 16559648, 16936000, 17312352, 17688704, 18065056, 18441408, 18817760, 19194112, 19570464, 19946816, 20323168, 20699520, 21075872, 21452224, 21828576, 22204928, 22581280, 22957632, 2984, 23710336, 24086688, 24463040, 24839392, 25215744, 25592096, 25968448, 26344800, 26721152, 27097504, 27473856, 27850208, 28226560, 28602912, 28979264, 29355616, 29731968, 30108320, 30484672, 30861024, 31237376, 31613728, 31990080, 32366432, 32742784, 33119136, 33495488, 33871840, 34248192, 34624544, 35000896, 35377248, 35753600, 36129952, 36506304, 36882656, 37259008, 37635360, 38011712, 38388064, 38764416, 39140768, 39517120, 39893472, 40269824, 40646176, 41022528, 41398880, 41775232, 42151584, 42527936, 42904288, 43280640, 43656992, 44033344, 44409696, 44786048, 45162400, 45538752, 45915104, 46291456, 46667808, 47044160, 47420512, 47796864, 48173216, 48549568, 48925920, 49302272, 49678624, 50054976, 50431328, 50807680, 51184032, 51560384, 51936736, 52313088, 52689440, 53065792, 53442144, 53818496, 54194848, 54571200, 54947552, 55323904, 55700256, 56076608, 56452960, 56829312, 57205664, 57582016, 57958368, 58334720, 58711072, 59087424, 59463776, 59840128, 60216480, 60592832, 60969184, 61345536, 61721888, 62098240, 62474592, 62850944, 63227296, 63603648, 6398, 64356352, 64732704, 65109056, 65485408, 65861760, 66238112, 66614464, 66990816, 67367168, 67743520, 68119872, 68496224, 68872576, 69248928, 69625280, 70001632, 70377984, 70754336, 71130688, 71507040 files# mount /dev/mirror/datas1a /data files# df -h Filesystem SizeUsed Avail Capacity Mounted on /dev/da0s1a3.8G 55M3.4G 2%/ devfs 1.0K1.0K 0B 100%/dev /dev/da1s1d8.3G1.0G6.6G13%/usr /dev/da0s1d4.0G4.2M3.7G 0%/var /dev/mirror/datas1a 33G4.0K 30G 0%/data -- Robert ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
You can try gmirror(8) Ref: 1. http://people.freebsd.org/~rse/mirror/ 2. http://www.onlamp.com/lpt/a/6309 On Thu, May 04, 2006 at 07:24:15PM -0400, Robert Fitzpatrick wrote: I have an old NT4 PIII here that has a pair Adaptec Array1000 Family controllers with 2 pairs of identical drives on one of them (2 IBM 9GB and 2 Seagate 35GB). From what I googled, *nix does not support the controller, so I have removed the RAID arrays and loaded FreeBSD 6.0 onto the two IBM drives. Now, I wanted to mirror the other two for data and looking for guidance as to whether it is first of all suited for software RAID and if so, CCD or vinum. I am contemplating vinum because the handbook mentions CCD is when cost is the important factor and for me, is reliability. What would someone suggest? If vinum, one thing I don't quite understand is do I create the partitions to be used in the device? There doesn't seem to be a man for gvinum and the link to it in the handbook section 19.6.1 is broken. Thanks in advance. -- Cheng-Lung Sung - clsung@ pgp5qEjA4LT8h.pgp Description: PGP signature
Re: Software RAID guidance
IMHO, fdisk is unnecessary. I got my two brand new HDs ad[46] mirrored w/o fdisk. On Thu, May 04, 2006 at 09:15:39PM -0400, Robert Fitzpatrick wrote: On Thu, 2006-05-04 at 19:59 -0400, Ian Jefferson wrote: I think if you want mirroring only you should consult the geom pages. Great, I believe I have this setup right. I'm not sure what the fdisk issue may be with the message 'fdisk: Geom not found', but all looks to have setup properly. Now, just to have a clear understanding, what is the purpose of /dev/mirror/datas1c as it is not used in creating the mirror it seems? Have you tried to mount it? -- Cheng-Lung Sung - clsung@ pgpn7j51uTNwz.pgp Description: PGP signature
Re: Software RAID guidance
On Fri, 2006-05-05 at 09:20 +0800, Cheng-Lung Sung wrote: Great, I believe I have this setup right. I'm not sure what the fdisk issue may be with the message 'fdisk: Geom not found', but all looks to have setup properly. Now, just to have a clear understanding, what is the purpose of /dev/mirror/datas1c as it is not used in creating the mirror it seems? Have you tried to mount it? files# mount /dev/mirror/datas1c mount: /dev/mirror/datas1c: unknown special file or file system -- Robert ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Software RAID guidance
Hi, newfs first? In my experiment, there is only one mirror/gm0s1 exists (no s1a, s1c...) On Thu, May 04, 2006 at 09:40:17PM -0400, Robert Fitzpatrick wrote: On Fri, 2006-05-05 at 09:20 +0800, Cheng-Lung Sung wrote: Great, I believe I have this setup right. I'm not sure what the fdisk issue may be with the message 'fdisk: Geom not found', but all looks to have setup properly. Now, just to have a clear understanding, what is the purpose of /dev/mirror/datas1c as it is not used in creating the mirror it seems? Have you tried to mount it? files# mount /dev/mirror/datas1c mount: /dev/mirror/datas1c: unknown special file or file system -- Cheng-Lung Sung - clsung@ pgpK0zIgjIVTI.pgp Description: PGP signature
Re: Software RAID guidance
On Fri, 2006-05-05 at 09:16 +0800, Cheng-Lung Sung wrote: 1. http://people.freebsd.org/~rse/mirror/ Great doc, thanks! I was able to get the first part of the 2nd approach booting from the gm0 mirror, but after booting and trying to add my da0 to the mirror, it does not recognize the device...I tried re-splicing the drive in sysinstall with no help... files# gmirror configure -a gm0s1 No such device: gm0s1. files# df -h Filesystem SizeUsed Avail Capacity Mounted on /dev/mirror/gm0s1a 8.3G1.2G6.4G16%/ devfs 1.0K1.0K 0B 100%/dev /dev/mirror/datas1a 33G4.0K 30G 0%/data files# ls -lah /dev/mirror/ total 1 dr-xr-xr-x 2 root wheel 512 Dec 31 1969 . dr-xr-xr-x 5 root wheel 512 Dec 31 1969 .. crw-r- 1 root operator0, 116 May 4 23:43 data crw-r- 1 root operator0, 118 May 4 23:43 datas1 crw-r- 1 root operator0, 121 May 4 19:43 datas1a crw-r- 1 root operator0, 122 May 4 23:43 datas1c crw-r- 1 root operator0, 109 May 4 23:43 gm0 crw-r- 1 root operator0, 117 May 4 23:43 gm0s1 crw-r- 1 root operator0, 119 May 4 19:43 gm0s1a crw-r- 1 root operator0, 120 May 4 23:43 gm0s1c Again, not sure where mine is getting the s1c devices...while the data mirror was setup with another doc, the gm0 setup flawlessly following your 2nd approach. -- Robert ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
