Tags: seagate

12/22/12

  09:58:00 pm, by The Dreamer   , 1422 words  
Categories: Hardware, Software, Computer, Storage, Operating Systems, Ubuntu, FreeBSD, Virtualization, Other Linux

zen resurrection

This was originally going to be a very long post, but I kept putting this off ... and now I just feel that something needs to be said.

The story starts with waking up on February 15th, to find zen was dead. It had self updated overnight, and now it was unbootable, and the start repair couldn't get me back. Apparently, the problem had started long ago with all the previous times where Windows 7 would lock up...usually under intense disk activity...and the afterwards, the intel matrix raid would require re-initialization of my 1.5TB RAID 1 array.

Apparently, it was slowly corrupting my drive....because trying to restore from WindowsImageBackup was also a failure. Since this happened the day before Gallifrey One, I had to wait until I got back to do some more serious attempts to recovery, during which I ordered a full copy of Windows 7 Professional, hoping that a repair install might be an option. It isn't because the repair option can only be invoked inside a running Windows 7 system .... in need of repair. Not by booting the disk. ARGH! :##

At least I should have the data in BackupPC to restore from.....though hopefully before the bit rot of its ext4 filesystem makes it go away. Plus I had hoped to get some configuration going where I could mount the RR62x RAID 5 array, and get at the Oops!Backup store.

So, the plan now was to wait until Ubuntu 12.04LTS to land and then maybe some configuration of running Windows 7 in VirtualBox and recovering into that, etc.

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08/12/11

  07:50:08 am, by The Dreamer   , 216 words  
Categories: Hardware, Storage

ST31500341AS vs 0F12117

So, thinking about how the sync of the ST1500341AS to 0F12117 was slightly slower than the sync of 0F12117 to 0F12117, I wondered what specs about the new drive would edge out.

Specs for the ST31500341AS that I could track down include:

Formatted capacity               1500GB
Guaranteed sectors               2930277168
Heads                            8
Discs                            4
Bytes per sector                 512
CHS                              63/16/16383
Recording density                1462 kbits/in max
Track density                    190 ktracks/in avg
Areal density                    277 Gbits/in2 avg
Spindle Speed                    7200 RPM
Internal data transfer rate      1709Mbps max
Sustained data transfer rate OD  135 MBps max
I/O data-transfer rate           300 MBps max
Cache buffer                     32MB
Average Latency                  4.16 ms
Track-to-track seek time         <0.8ms read
                                 <1.0ms write
Average seek, read               <8.5ms
Average seek, write              <10.0ms

Specs for the 0F12117 that I could track down include:

Recording density                1443 Kbpi
Track density                    285 Ktpi
Max areal density                411 Gbits/in2
Data buffer                      32MB
Rotational Speed                 Coolspin (5940 RPM)
Media transfer rate              1366 Mbps max
Typ Sustained transfer rate      136 MBps max
Interface transfer rate          600 MBps max
Heads                            6
Discs                            3
Bytes per sector                 512
CHS                              63/16/16383
Total Logical Data Bytes         2000398934016 bytes
Number of sectors                3907029168
Track-to-track seek time         0.5ms typ 0.7ms max read
                                 0.6ms typ 0.8ms max write
Average seek, read               <8.5ms
Average seek, write              <10.0ms
Average Latency                  5.05 ms

Probably all comes down to recording density....the Hitachi 2TB having more data stored on in less area than the Seagate 1.5TB, makes the Hitachi faster than the Seagate....

08/07/11

  06:43:59 pm, by The Dreamer   , 165 words  
Categories: Hardware, Computer, Storage

Another Harddrive is biting the dust

Two years ago I bought a pair of 1TB drives from NewEgg.

This being first Sunday and all, mdadm checkarray ran on Orac for several of the arrays (the 3 arrays that share the 5-bay port multiplier enclosures are excluded, and get run individually later....since running at the same time is slow)

Anyways....1 of the 1TB drives spat lots of errors....and Orac is pausing now as it spits errors now and then. Guess I'll look to getting a new 1TB drive via Amazon Prime?

I was curious, and went to check warranty status on Seagate....nope. Really, went over to NewEgg to see when I had gotten the drives and what kind of warranty it had.... Only a 2 year warranty. Guess that's that.

Wonder if I should buy one new drive, two new drives....and if I go two new drives....should I get bigger ones? They don't fit the original expansion plan I had....plus my usage has grown to where the old plan doesn't work anymore....

hmmm.... &#58;&#104;&#109;&#109;&#58;

03/15/11

  02:48:37 pm, by The Dreamer   , 1358 words  
Categories: General, Home Theatre, Software, Furnishings, Storage, Healthcare, Roku XDS, Boxee

Today is supposed to be Roku day

And, it will be....but first I decided that I should get at the clutter of new stuff that I hadn't gotten around to yet.

First up was a Sans Digital MS2T+B MobileSTOR enclosure I had picked up a while back. The current array that backuppc goes to on orac is filling up. It's just a 4TB filesystem on a RAID6 array using 1.5TB drives. There's one other filesystem on this array and it could use some more room as well. I have debated whether the array needs to be RAID6 for backuppc, or whether RAID5 would be sufficient. But its the other filesystem that is driving RAID6, though I wonder if RAID 0+1 might be better for that (or just RAID1, since it is currently small enough). But, I'm using a pair of 5 bay PM enclosures....and older RAID 1 in one, and the RAID6 array in the other.

So, I've decided that I'll likely look at getting 5 2TB drives and doing RAID5 for a backuppc only array....keep the current 5 1.5TB drives in RAID6 for the other filesystem and whatever else I might want to move over to it. But, the stuff on the current 1TB RAID 1 array should just stay put. Well, there are two (of 4) regular eSATA ports on the back of orac that aren't being used yet. So, that's where the 1TB RAID 1 array will go.

It is still a ways off before I take the plunge and actually build the new array (though the backuppc filesystem has filled up twice since I thought up this scheme)... though prices are dropping and I do have a tax refund coming that many other things I want to use it on (including a travel/backup cpap setup, which is about the entire refund...oops).

But, I decided I would set it up, because I saw 2TB Hitachi drives the other day for cheap (they did recently get acquired by Western Digital, so sellers might be clearing out the Hitachi branded drives?) So, it might fall into range of what would be an acceptable single month discretionary purchase. Though technically, I've already done this month's when I bought the Nanosat speaker package that was a NewEgg shell shocker....though I used BillMeLater. I've been wanting to get this set to upgrade the odd ball collection of old speakers that is my current setup. But, the shellshocker price put it just into the range.... But, I was considering Seagate drives...which then dropped to remain cheaper than Hitachi....Hmm....

Anyways...I went to put the new enclosure into service, but I couldn't find the pair of eSATA cables I thought I had set aside for this. I did buy a pair of eSATA cables last fall from Amazon.com. But, evidently I used them for something else. I'd guess when I moved orac, I needed the length...not sure where the old cables went to then, but the probably aren't long enough for this. So, did some quick eBay purchases...and maybe I'll get to this eventually....

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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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