Date: Thu, 24 May 2007 10:18:29 -0500 From: "illoai@gmail.com" <illoai@gmail.com> To: kalin@el.net Cc: freebsd-questions@freebsd.org Subject: Re: raid or not raid Message-ID: <d7195cff0705240818l49a3f91fmffe99e6043db94fb@mail.gmail.com> In-Reply-To: <58059.74.64.6.149.1180014579.squirrel@mail.el.net> 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> <58059.74.64.6.149.1180014579.squirrel@mail.el.net>
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On 24/05/07, kalin mintchev <kalin@el.net> wrote: > >> > > >> > 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..... > >> > . . . > > 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'? Not knowing what hardware you have, I would still hazard that a RAID device will not show up as /dev/adN. I would guess that the RAID controllers that use cam might have their devices called by the /dev/daN convention, but I don't know that. > 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... > I would agree with that. -- --
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