Tags: raidz2

01/24/13

  10:23:00 pm, by The Dreamer   , 1549 words  
Categories: Hardware, Computer, Storage, Ubuntu, FreeBSD

SSD Craziness

Over the last year, I started buying SSD drives. It used to be that they seemed pretty expensive, and of questionable performance and reliability. But, all things have improved over the years. And, when 120GB drives dropped under $1/GB (initially after rebates, later before rebate [if any]). I didn't have an immediate need for an SSD drive at the time, but I envisioned replacing the drive in my (u) laptop. And, perhaps my (w) laptop....beyond that I wasn't sure.

 3/05/12 - Patriot Pyro 120GB             - $159.99-$40 rebate = 119.99
 3/20/12 - OCZ Agility 3 120GB            - $139.99-$30 rebate = 109.99
 4/27/12 - Mushkin Enhanced Chronos 120GB - $ 99.99
 5/16/12 - OCZ Solid 3 60GB               - $ 74.99-$20 rebate =  54.99
 8/10/12 - Sandisk 128GB                  - $ 79.99
11/21/12 - Kingston HyperX 2K 240GB       - $149.99
 1/18/13 - Sandisk Extreme 120GB          - $ 89.99-$15 reward =  74.99
 1/18/13 - Sandisk Extreme 120GB          - $ 89.99-$15 reward =  74.99

But, during this time...I had the lhaven misstep Where I had picked up the 60GB drive for that, but ended up using the Mushkin 120GB drive instead. The OCZ Agility 3 120GB had gone in as OS drive for my Xen Cloud Experiment. And, stayed when I went on to making it FreeBSD. Cut up initially as 64k boot, 32GB swap, 16GB L2ARC for the mirrored 1.5TB drives to help with dedup...and the rest...63GB root zpool.

Somehow the Patriot got misplaced for a while, so it got overlooked during the chaos.

After a 'break'. I picked up the Sandisk 128GB drive. Thinking that it might be a better choice to use to finally replace the (u) laptop harddrive. Though I waited until after the NN conference in October to do it, but before I went to LISA in December. Though I didn't finally upgrade the the OS to 12.04 (from 10.04) until just last week. I had thought about doing a clean install to 64-bit....since there were some issues since I upgraded the memory to 8GB. But, changing the hibernate method seemed to have solved the issue....so decided to leave it 32-bit. Though my (w) laptop is 64-bit...though it only has 4GB. Not sure if I'll upgrade it to 8GB. Or when I'll upgrade its harddrive to SSD.

Things have been kind of tight since...on the 128GB Sandisk drive. partly because swap got a bit bigger...had suspected that 8GB swap was iffy for hibernation....so had bumped that up. Plus the original harddrive was 160GB. But, the lion share of space consumption is my Windows XP VM. But, it get's the job done.

Meanwhile...around this time I got the idea that instead of making the risky upgrade of my two Ubuntu servers from 10.04 to 12.04, that I would set up two new FreeBSD servers and migrate the essential services over before deciding the future of those systems. So, I acquired a pair of Shuttle XS36V's...4GB of memory for each...and then eventually the plan was to acquire a pair of SSDs for them. Which I finally did last week as a pair of SanDisk Extreme 120GB drives. (with the help of $30 from Best Buy Reward Zone....and this purchase should get me a $5 reward zone soon.) And, these will probably get installed as FreeBSD 9.1.

Pages: 1· 2

11/05/12

  10:30:00 am, by The Dreamer   , 2100 words  
Categories: Hardware, Software, Computer, Storage, Ubuntu, FreeBSD, VirtualBox

Orac is looking strangely bare, with Zen taking over.

For a long time, I've been running a 6 drive RAID 10 array of Hitachi 5K3000 2TB drives in Orac for backuppc. This configuration got me at 5.4TB array, and somewhat better performance than when I tried a RAID6 configuration. But, eventually, I kept running out of space and the price of harddrives went up so expanding the array over time didn't happen as I had hoped. Being RAID10, the options were other concat another array, either 2 in RAID1 or 4 in RAID10 or 4 as 2 RAID1....using volume manager. Or maybe see if RAID10 would deal with having all 6 drives upgraded to 3TB, though hadn't considered the transition of 512 to 4k and how it would cope with that.

Though I did, eventually find out when I upgraded a 1.5TB RAID1 set to become a 2TB RAID1 set....going from ST31500341AS to ST2000DL003, where I contributed my experience here: http://askubuntu.com/questions/141669/creating-properly-aligned-partitions-on-a-replacement-disk/ Though it first started because one of the ST31500341AS drives had failed.

Before the failure of one of the 1.5TB drives in the above mentioned RAID1 set, I had 4 ST31500341AS in a RAID5 on old-Zen. It had been done in under RR622, under Windows, and NTFS partitions, etc. I had tried copying the data at various times, not really having anywhere that would hold the data elsewhere...but wanting to get it over to FreeBSD for recovery. While I got the rr622 driver working, and it saw that I had a single array (rather than the native driver that would see the 4 individual disks.) I couldn't get access to the data. Though it had worked when I was previously playing around with Xen (had tried copying it then....to a 2 1TB RAID0 set, but then one of the 1TB drives died....so I lost the copy, I had then replaced it with a 2TB RAID1 set....using an ST2000DL003 and an ST2000DM003, the DL being a 5900RPM drive and having a 5 year warranty...while the DM drive is a 7200RPM drive, but with only a 1 year warranty. And, turns out the 1 year is generous.

At work, I had built my FreeBSD desktop using a pair of the ST1000DM003 drives...and 3 drive failures later....it is now a pair of ST2000DL003 drives. Yeah...I was having trouble with the array, and apparently using XFS was a mistake too...because I thought it was recovering, but instead it was slowly eating the data. When I had nuked the RR622 RAID5 array, and had switched to using it as JBOD and create a RAIDZ set under FreeBSD...I found that there was nothing to copy back from the RAID1 array. D'Oh! >:XX

Though I had also copied the Microsoft WindowsImageBackup files, to see if I could mount the VHD file under VirtualBox to help in recovery. I largely had the data in bits and pieces elsewhere, it was the environment I was wanting to recreate...and Oops!Backup didn't back up that part anyways (the data I was mainly trying to migrate). The image mounted, and I could see it...but soon after Windows would try to fix it and then it would disappear....kind of like what it did on February 15th to make the original Zen go away. No idea what kind of disk rotting the Intel Matrix RAID had been doing, when it had to initialize the array again every time after a Windows crash. I've had Ubuntu crashes, but the RAID arrays remained stable...usually. While Windows & Intel RST....it was pretty much every time. I'm sure it was slowly corrupting things overtime to where things wouldn't recover, though it choose to do that after an automatic reboot for Windows updates...and the day before I left for my first Gallifrey One made things even more annoying.

Anyway with another 1.5TB drive freed up, I contemplated adding it to the RAIDZ I had made of the 4 1.5TB drives, keeping it as a hot spare, or just use it by itself -- living dangerously. I ended up with the latter for some temporary data. Because in my mind I was starting to lean to what happened next.

Pages: 1· 2

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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