Date: Thu, 24 May 2007 09:49:39 -0400 (EDT) From: "kalin mintchev" <kalin@el.net> To: "illoai@gmail.com" <illoai@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: raid or not raid Message-ID: <58059.74.64.6.149.1180014579.squirrel@mail.el.net> In-Reply-To: <d7195cff0705240407w50617086i6ebbdfc4b9eaeac1@mail.gmail.com> References: <54316.74.2.36.140.1179892303.squirrel@mail.el.net> <61733.74.64.6.149.1180002606.squirrel@mail.el.net> <d7195cff0705240407w50617086i6ebbdfc4b9eaeac1@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
>> > >> > i have a box in a remote hosting facility that claims that the machine >> has >> > two discs raided in it but df and fstab show only one disc with a >> bunch of >> > slices. >> > under devices there is another name - ad6 - but it's not mounted >> anywhere. >> > the one i see both in df and the fstab is ad4 with one big slice and >> > different partitions.... >> > >> > they insist there are 2 raided discs in tha machine. the os is 5.4 and >> i >> > think at that point the raid drivers were still considered >> 'experimental'. >> > >> > it makes sense to me that if i don't see a second drive in the fstab >> there >> > isn;t any mounting which means that there is no raid going on... >> > >> > is there any other way i can make sure if raid is actually on? >> > would there will be any logs somewhere? >> > the machine has been up for about 2 years and the dmesg is long >> gone... >> > >> > thanks..... >> > > > Lots of people here know plenty about RAID, > but you don't provide very much information. ok. fair enough... thanks. > If dmesg itself returns none of the startup info, > you can look in /var/log/dmesg.[today|yesterday]. as i mentioned the machine has been up without reboot for almost 2 years... > /usr/sbin/pciconf can tell you what controller(s) > may be attached. right, i forgot about pciconf... i can see one SATA and one EIDE controllers. both ATA subclass. no RAID controllers. nothing about RAID anywhere from pciconf.... > A proper RAID will show up as a single device, > just like any hard drive (but different). what do you mean by 'but different'? the actual df output lists this: # df -h Filesystem Size Used Avail Capacity Mounted on /dev/ad4s1a 290M 81M 186M 30% / devfs 1.0K 1.0K 0B 100% /dev /dev/ad4s1d 989M 50K 910M 0% /tmp /dev/ad4s1f 15G 5.0G 8.4G 37% /usr /dev/ad4s1e 989M 33M 877M 4% /var /dev/ad4s1g 126G 90G 25G 78% /work i read it as one disk - ad4 - with one big slice 1 and 5 partitions. am i wrong? fstab shows same devices. > It does seem odd to me that a (supposed) RAID > would show up as /dev/ad4. please elaborate. do you mean that the raided disks will have another id/name rather than 'ad'? > Possibilities: > Your RAID really is on /dev/ad4 and /dev/ad6 is > something unexplained. > Your RAID controller is unsupported in 5.x and > not Doing The Right Thing but somehow still (kind > of) working as a normal [S]ATA controller. > Your RAID controller is unsupported in 5.x and > your hosting company realised this and wired > the shebang up as a normal [S]ATA controller > because they couldn't get FreeBSD to install > otherwise. > There is a RAID controller and there are two disks > connected to it, but the controller was not set up > correctly. > There is a RAID controller and there are two disks > connected to some other controller which might lead > to some interesting phone calls. > Your remote hosting company put a RAID with two > disks in some random machine and someone else > is complaining on some other list about the inverse > of your problem. ok. i guess i'd explore the 'interesting phone calls' one. if it doesn;t walk like a duck and it doesn;t quack like a duck it must be some other bird/thing... > > -- > -- >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?58059.74.64.6.149.1180014579.squirrel>