You’ll be massively oversubscribed. The md’s to some extent have no bearing on this. Email required Address never made public. Fill in your details below or click an icon to log in: As you reply, please be aware that I am a Newbie. Please visit this page to clear all LQ-related cookies. My question is simply if there are 15 drives per shelf and 3 shelves, how do i know which drives go on which lane of a given 4x connector?

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Is that documented anywhere?

It should be noted, this is not how SAS 1 works. That’s a theoretical max throughput of 1. All times are GMT limux SAS, by in large is just a big single cable, the easiest way to think about it is Christmas lights.

Join our community today! A valid point about saturation though.

Find More Posts by marcosphx. You are commenting using your Facebook account. Dell powervault T tape drive in debian. My point is cell, if you have a couple of 1Gb NICs on this box and are using it for backup, you very well may never need to worry about the bandwdith of the SAS chain, because you’ll never hit that limit before you max out your network or the throughput capabilities of your backup clients. Sign up or log in Sign up using Google. You are commenting using your Twitter account.


As you reply, de,l be aware that I am a Newbie. Ok, so help me through this a little more.

What I’m having trouble finding information on is how are drives assigned to a lane, and how does that change when you daisy chain two additional md’s to another md? Please visit this page to clear all LQ-related cookies. That said, if I could design the system myself, I would give you more SAS bandwidth, but my take away here is it may not be a problem in the real world at all. This book contains many real life examples derived from the author’s experience as a Linux system and network administrator, trainer and consultant.

Is that measurment reporting a duplexed speed? Server Fault works best with JavaScript enabled.

PowerVault MD1000 LINUX – OS drivers

The lanes aren’t being broken apart or anything like that. Any distribution can be a server. Click Here to receive this Complete Guide absolutely free.

Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. By continuing to use lihux website, you agree to their use. The backup server would have to have enough CPU to process all that traffic.


I understand that each lane is 3Gbps, and that multiple hard drives can share a lane. All, So here is the answer, the SAS back plane is basically just a huge bus architecture. We had decided to upgrade the Linux CentOS 4. Dual paths de,l only provide redudancy, not throughput.

They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

Dell PowerVault MD troubleshooting and installation help: SAS.

While it would suck if an entire array of shelves went offline, it’s not the end of the world. From a generic raid controllers perspective it just see’s 45 drives. JamesRyan I’m not familiar with linx concept, could you please elaborate? Visit the following links: You’ll be massively oversubscribed.