Raid 10 is an Raid 1+0 ??
2011/10/27, Casey <[email protected]>: > On 10/27/11 9:52 AM, Eric Shubert wrote: >> On 10/26/2011 09:07 PM, Pak Ogah wrote: >>> On 10/27/11 10:24, Casey wrote: >>>> >>>> On 10/26/11 7:55 PM, Eric Shubert wrote: >>>>> On 10/26/2011 06:44 PM, Casey wrote: >>>>>> >>>>> .... >>>>>> Also, what are you using as a >>>>>> RAID controller? Hardware, Linux, fakeraid? >>>>> >>>>> Linux software raid. No special hardware controller, just straight >>>>> through devices. >>>> These 2560's have PERC3/Di controllers - 128MB RAM, and a battery >>>> backup...is a Linux software RAID a better option? Performance? >>>> Reliability? >>> My 2,000 Rupiahs, :D >>> Hardware Raid controller with amount of memory and Backup batery is much >>> more better than Software. >>> I only use software raid, if I don't have the controller and want data >>> redundancy. >>> >> >> I disagree. >> >> Let me begin by saying that if you run raid-5, you'll likely need a >> hardware raid solution (not fake raid) in order to handle the cpu >> requirements. Raid-5 also can give improved read performance with >> many,many drives. That's not a typical scenario though. >> >> With raid-1 or raid-10, there's not enough of a processing requirement >> to warrant extra hardware. The main CPU can handle it just fine, and >> the hardware raid won't buy you much (freeing up cpu cycles). >> >> With a QMT host, disk performance is probably not going to be your >> limiting factor, so I wouldn't be very concerned about performance of >> one configuration vs another, so long as you don't need to use raid-5 >> for whatever reason. If you decide that you must use raid-5, use a >> hardware controller for it. I must say though, that I (strongly) >> recommend avoiding raid-5 whenever possible. >> >> The big problem I have with hardware raid controllers is that they use >> proprietary methods to store the data on disk. When a raid controller >> goes bad (and they do), you *must* have an equivalent controller in >> order to access the raid array. That's a position I like to avoid >> being in. If it's a card that's no longer available, you better have a >> couple (that you know work) sitting on the shelf just in case. >> >> On the other hand, with software raid, I can access and recover data >> from the drives quite easily with any ol' commodity hardware. >> >> BL, hardware raid controllers are only beneficial with raid-5, which I >> don't use or recommend. Give me software raid any (and every) day. >> > Ok, ok...you sold me on it. Time to re-install. 3rd time is a charm, > right? Now I just need to figure out my partition scheme for the array > using the QMT5-ISO install. Could someone give me a couple of > partitioning scheme recommendations for this back-end server I'm trying > to setup? Is 150MB still the size recommendation for one of the > unmounted partitions for DRBD? Should /boot be on its own partition? How > big should I make the swap partition? I have 6gigs of RAM in this machine... > > I'm opting to do the 5 drive RAID-10, using the 5th as a hotspare. Just > need a little guidance, so I can set this thing up the right way from > the beginning of it all. > > Casey > > Smile Global Technical Support > Submit or check trouble tickets http://billing.smileglobal.com > www.smileglobal.com <http://www.smileglobal.com> > -- Enviado desde mi dispositivo móvil --------------------------------------------------------------------------------- Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! --------------------------------------------------------------------------------- Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
