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About JaredDM

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    Providence, RI
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    Data Recovery

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  1. JaredDM

    Need an Areca Expert For Odd Situation

    Oh yeah, and after you get your array back online the first time, you have to go back to the RAID rescue menu and type in "SIGNAT" to regenerate the metadata on all member disks. Otherwise, the rescue won't survive a reboot. Learned that the hard way, but no big deal.
  2. JaredDM

    Need an Areca Expert For Odd Situation

    That is entirely the wrong procedure. Fortunately, I knew better than to listen to this as it would have nuked the metadata. (unless you're talking about restoring from backup, but that would have required moving around 30+Tb of data, and I didn't want to even consider that). Fortunately, Areca support was very helpful (albeit slow to reply to messages). Turned out I had to set the "failed drives" (not really failed) to be active. Then I could attempt to do a Rescue RAID set (which didn't work in my case). Finally what I had to do was to go to the menu where you normally would type the word "RESCUE" in the rescue RAID set menu and instead type in LeVeL2ReScUe (just like that) and reboot. It was able to reassemble the array with all data still intact and has been fine since then. Also, I was told to be sure to only have one RAID set physically attached when doing the level 2 rescue. Hopefully this is helpful to someone else with a similar issue.
  3. So I've been using an Areca 1880ix card for some time for two RAID 6 arrays I use for some huge DAS needs. I've dealt with the normal issues of a drive dropping offline or failing plenty of times. However, today I come in to find a rather odd situation. I've got 16x 4Tb HGST drives in an external enclosure connected to the card. This morning I come in to find that 12 of the 16 are showing as 0Mb size and as "failed". I took out and tested some of the "failed" drives on another system and they're perfectly fine. No hard drive issues at all. Then I was thinking that perhaps the enclosure (which uses SAS multipliers) had failed. So just to test I used the "set failed disk to active" option on one of the drives and sure enough it now shows correct size and ID. So the enclosure must be fine too. So at this point it seems that all the hardware is perfectly fine, but the controller thinks that 12 drives are failed when they're not. I've got about 30Tb of data on this thing. None of it doesn't exist somewhere else, but it'd save me a ton of time if I can get this array to go back online. I'm just not sure how to proceed here. I see that the "failed drive" which I Activated now shows as free and not as a part of the RAID set anymore so it looks like it got kicked out of the RAID set when I reactivate it (good thing it's RAID 6 and I can afford to lose a disk or two). So my question is, how do I get this thing to realize that the other 11 disks are actually still good and try to go back online?
  4. RAID 0 with a bunch of 8Tb drives....YiKES!!!! That's a recipe for a quick catastrophe. No point in hot spares with RAID 0. One lost drive and it's game over. No rebuilding there because RAID 0 has zero redundancy. At a minimum, you should be running RAID 5.
  5. I'm sure an official Seagate representative isn't going to respond back and tell you how bad a particular model is. But, there are plenty of us who work in professional data recovery who will gladly tell you that. Seagate drives have had some serious quality issues as of late. It doesn't seem to affect their enterprise drives, but they've had serious issues with their consumer grade drives. One model, ST3000DM001 had such high failure rates that they are being sued in a class action lawsuit right now. From what I'm seeing come in, I don't think these Rosewood drives (ST2000LM007) are going to fare much better. In the 4Tb and up desktop drives, there seems to be some improvement in the quality now. However, they've still got a long way to go to catch up to the reliability of other brands like HGST. There's also the matter of the company forcing people to use their data recovery services now. Ever since Seagate started their own data recovery services company, they've begun actively trying to make data recovery impossible to all companies except their own. They've locked out the terminal, encrypted the firmware, etc. so that only their company will have the necessary passwords to attempt recovery when it does fail. So they're basically a company who's bent on selling people what they know to be a crappy product, then force you to buy their service when it fails if you didn't have a good backup. It's bascially like if Ford put a secure lock on the hood of a car they knew was prone to engine problems, so you'd have to use their service centers to get it fixed and they'd have no competition. I personally prefer not to give my hard earned money to companies who treat their customers that way.
  6. Run away, RUN AWAY!!!! That model is a Rosewood series of hard drive from Seagate. They are as cheap junk as cheap can be. They are so cheap they didn't even put a full metal top cover on there. The only thing keeping the dirty outside air out from contaminating the drive is the sticker on the top. Plus, these are an absolute nightmare for data recovery. They seem to have soft platter surfaces that scratch very easily, and they rarely work after heads are replaced even by professionals. We see a lot of them already coming in for data recovery. Most just have the heads stuck to the platters, so those are easy enough recoveries, but when the heads fail it could be a total loss of data. If you did buy one of these, I'd recommend you have two backups.
  7. JaredDM

    Most Common RAID Controllers

    Thanks, I added those to my list of cards to bring in and analyze. If anyone else has other common ones to suggest, please let me know.
  8. I'm working on a project to deconstruct how a number of common RAID controllers write metadata to the disks to keep track of the RAID config. Working in pro data recovery, I'm doing this to try to speed up our work when various array types come in and we have to reverse engineer them. So I'm just curious what you all think are the most common controllers out there. Currently, I've got the full spread of Areca cards figured out, as well as Perc 6, Perc H710, HP Smart Array cards, a number of Adaptec cards, LSI MegaRAID, etc.. I'm just looking for other common ones typically used in small to medium business servers. I'm not so concerned about big enterprise stuff, as they usually are smart enough to have a backup. I just figure it's better to reverse engineer them now than have to race against the clock when 20 drives show up for recovery and it needs to be done in two days. So what cards have you seen used a lot?
  9. JaredDM

    RAID using WD Velocity Raptor HD's:

    All HDDs and all SSDs can be used in RAID. The only reason some drives are "recommended" for RAID when others aren't recommended has to do with their ability to handle vibration. They assume you'll be putting a bunch of them into an enclosure or rack together where the vibration might build up. That and you should never use Green drives in a RAID as the power saving functions can cause chaos. For a two drive array vibration is really a moot point. There's no reason not to use a couple Velociraptors in RAID, but unless you use an actual hardware controller there's also not going to be much benefit. Honestly you'd be 100x better off just investing the money into a good SSD. As to doing a RAID of SSDs you're unlikely to see much benefit to a RAID 0 or RAID 5 as far as speed is concerned. Most likely the extra latency the controller would negate any benefit of the RAID. It might even end up slower than a single SSD in some cases. RAID 1 is good for redundancy in case one fails (however you still need a backup in case of logical corruption), so if uptime is important you might consider that.
  10. If you look at David Johnson's posts, nearly half are spamming Stellar's software. So this isn't an "unbiased" opinion, it's just SPAM from some clown who either works for Stellar or is getting paid to SPAM for them. Flagging it now. The only thing Stellar is "stellar" at, in my opinion, is lying to people while spamming every forum on the planet.
  11. Deleted accidental duplicate post.
  12. I've seen issues at times where USB controllers (even ones built into the motherboard) start to go unstable and occasionally will disconnect for a split second. This can cause errors in the data if it was currently writing to the disk. Especially, it would cause such issues if it was only modifying a large file such as a database. Doing nothing but data recovery work, we actually tend to wear out USB controllers and always keep a few add-in cards handy for when they go. So I've seen them act quite strange when they are on the way out.
  13. In that case, perhaps you can try this company: http://www.chandigarhdatarecovery.com/ I've had quite a few conversations with Amarbir, the owner, on various chat forums. He seems to know his stuff.
  14. They are ripping you off. I've seen plenty of $2K+ cases quoted by Kroll and Drivesavers that we recovered for under $1,000. A few of which they had deemed "unrecoverable" and given up on. The problem is they are big companies with lots of employees. And of all these employees only about 1/4 are actually doing data recovery work. The rest are all just marketing, sales, customer service, SEO, advertising, etc. You're much better off using a smaller company with only a handful of employees and most are all are actually the technicians.
  15. Here at our data recovery lab for a dropped WD you can pretty much bet that the price will be $650 + cost of donor parts. If the drive isn't clicking it's possible that the cost could even be a bit less. Just to give you a baseline. From the way you spell "centre" I'd assume you're in the UK (we spell it center here in the USA)? If so I'd recommend you try out this company: http://www.pcimage.co.uk I've had discussions with the lead technician there and he's very good. Well respected even among data recovery pros.