Tags: port multiplier


  08:56:22 pm, by The Dreamer   , 445 words  
Categories: Hardware, Software, Computer, Storage

I moved orac today

Its time that the full backups have been taking place on orac's backuppc. And, my /var/lib/backuppc doesn't quite have enough free space for a full of some of the jobs (I guess it doesn't matter if many, if not all, of the files would already be in the pool, it still needs more free space than I have in the filesystem to do the job).

So, I was looking at what I could about moving some stuff around so that I can grow /var/lib/backuppc by more some more....to perhaps 3.5TB. And, I thought about why it was that orac was located where it was. Basically it was just an open spot near the monitor.... And, it really needed to move somewhere, where I could better park the external drive cases. Currently the main one was a Rosewill RSV-S5...there's a Sans Digital TR2UT-B, but I had recently picked up a Sans Digital TR5M-B that I needs a place where I can park it near orac.... Along with the two old 500GB My DVR Expanders.

So, the plan was to move it next to lhaven, though I ended up moving lhaven into the spot opened up by orac. orac has side vents so it couldn't go exactly where lhaven was, but decided to move lhaven out of the way so that I could get in and cable up orac.

Before turning orac back on...I did the storage changes. I setup the Sans Digital TR5M-B, its smaller than the Rosewill RSV-S5....moved the 2 1TB drives from the Sans Digital TR2UT-B over to it, and hooked up the 2 old 500G MyDVR Expanders to the regular eSATA ports on the back of orac (the system has 6 SATA ports internally, and I had gotten 4 port SATA back to run 4 of the ports out for future upgrades....that was before I got the 2 port PM eSATA adapter for the PCIe x1 slot.)

Also discovered that the bays number the other way around in the TR5M.

Now with orac up again, I was kind of expecting the drives to be in different places...but they were all in the same place. And, 500G MyDVR Expanders in sequence after the two internal drives.

Quick look around, and then immediately went about turning the MyDVR Expanders into a RAID 1 set and a single ext4 filesystem. And, then I started moving files over to it. Of course, that slows down the build of the RAID....

But, now to wait until I decide how to move the other pieces around....

Wonder how long before I amass the 5 2TB drives to build the new RAID5 to move the current /var/lib/backuppc over to.... (keeping the current 5 1.5TB RAID6 for more important data).


  04:20:00 pm, by The Dreamer   , 1373 words  
Categories: Software, Computer, Storage, Ubuntu

5-bay RAID and backuppc

Ever since I learned about 5-bay port multiplier SATA enclosures, I've been wanting to get one to play with. And, when I acquired 'orac'...I sought out a port multiplier eSATA adapter to include in the build of the system. And, then waited for support of the adapter in ubuntu. Stopped on 8.04LTS and waited for inclusion in a kernel.

I took a step closer when I finally got the 2-bay enclosure to mirror a pair of drives I had impulsively purchased. Since it worked, I then then bought a 5-bay enclosure (it came up as a NewEgg ShellShocker).

But, after some thought, I decided that what I wanted to do was build a 5 disk RAID5 using 1.5TB drives....so it would get me at least 5TB of real storage. And, set that I would wait until 1.5TB drives were under $100.

In the meantime, I collected a bunch of old SATA drives to see what I trouble I could get into....it didn't last long, as one was definitely dead and two quickly failed. Of course, two of the had been kicked out of RAID1 setups previously, and the other was a failing drive that I replaced/upgraded. So, it was back to waiting.

Eventually, I got 3 Samsung 1.5TB drives through NewEgg ShellShocker. And, I set up a 3 disk RAID5. Sadly, it didn't last very long....one of the drives failed while I was building the array. I exchanged it for a new drive with NewEgg, and waited for it before trying again. While I was waiting, I formatted it a bunch of times and learning about smartctl and various things of drive repair. One of the remaining two original drives, was showing signs of slow death and one unrecoverable sector. When, the new drive arrived...I did a long self test and a quick, but full, format....taking a couple days before I created the 3 disk RAID 5.

Once, that was done, I created a new big filesystem that is /var/lib/backuppc to have backuppc on 'orac'. Initially a 1TB filesystem.

Then one day, the bad happened. A drive on 'gumby' failed. It was time to stop putting off figuring out how to setup backuppc and start putting stuff into it. It turned out to be a lot easier than it thought to get started, though I did have to rebuild smbclient to have a longer timeout to get it successfully complete a full backup of a given partition. I then learned some other stuff and fine tuned the configs.... One big change was I broke out the windows hosts into individual partitions (ie, gumby_c, gumby_e, gumby_f), and came up with a 'semaphore' solution so that it wouldn't backup more than one partition at a time from a windows host. Eventually, I had all my systems in it (it fully backs up everything except itself, where it backs up only key parts....) I even got it backing up my work Mac Book Pro.

I later grew the filesystem out to 2TB.

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  06:44:48 pm, by The Dreamer   , 161 words  
Categories: Hardware, Momitsu V880N, Storage

iozone read/write performance of RAID1 vg's

Was discussion storage speeds with some friends over lunch....so I wondered if I could get some data comparing the performance.

vg0 is are two internal SATA drives, each on their own SATA channel, being mirrored. vg1 is the SANS Digital pair of drives, sharing a SATA channel via Port Multiplication, being mirrored.

Guess the graphs show that the internal drives are faster for small files....though for larger the difference goes away, so that things are comparable.

As it is....vg1 is mainly my MMCVideo filesystem - MMC (Momitsu Media Center). So, the files tend to be large and sequentially read/written.

Meanwhile, I've already removed the old MMCVideo logical volume from vg0 and doubled the size of /home. Even though now that I think of it, there's stuff under /home that might better go in its own logical volume(s)....now that I have room to create them.

Or later go on that HP MediaSmart Server that I've been dreaming of adding to my network.... :hmm:


  07:59:00 pm, by The Dreamer   , 381 words  
Categories: Hardware, Storage, Ubuntu

SANS Digital TowerRAID TR2UT-B & ubuntu 8.04LTS

I've been wanting to try a Port Multiplier eSATA enclosure on my Ubuntu 8.04LTS Server, known as 'orac', for sometime. But, keep getting sidelined by how much it would cost to get a 5-bay enclosure and 5 drives... it would only be a matter of time that the price of drives would come down.

But, storage has been tight on my file server and it has been causing issues, and I know I'm going to have tons more stuff to add to it. The server current is just a pair of 500GB internal drives mirrored in RAID1. So, I started looking at options to add 1TB of RAID1 storage. I considered buying two discrete external 1TB drives....or buying an external enclosure that does RAID1. When I came across the SANS Digital TowerRAID TR2UT enclosure, and a few other like it....I narrowed on this one because it was under $100 and available under Amazon Prime. But, this enclosure sat in my cart 'saved for later'.

The reason I considered the enclosure was that it purports to do various RAID configurations on its own, additional it can be just JBOD and connect to a Port Multiplier port on 'orac'. If the drive didn't work on Port Multiplier, I could resort to the other options....additionally, it does USB...so if it just doesn't work on eSATA I could use it that way. Especially, should I later get 5 bay PM eSata boxes and displace this one. And, there's that thought that I might get an Airport Extreme and do TimeMachine backups to a USB attached storage....

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Now instead of subjecting some poor random forum to a long rambling thought, I will try to consolidate those things into this blog where they can be more easily ignored profess to be collected thoughts from my mind.

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