Any brand has the occasional lemon but overall WD is decent. To get started, you will need to connect the USB device that you intend to work with to the computer. Version: 2.0, Size: 757KB. USB Drive Format Tool is a tiny freeware utility designed for formatting any USB storage devices (USB Flash drive, USB stick, USB pen drive, USB portable drive, and SDCard) in FAT, FAT32, exFAT, and NTFS file systems.HP USB Disk Storage.This tool will help to repair the corrupted Pollex USB flash drive The tool should be Run as. I know - I've made the same mistake and paid for it.And when you fail to format a USB flash drive in Windows File Explorer or Disk Management, you have to turn to a dedicated USB formatter. Yeah that's a recipe for disaster. You're talking about a device extremely sensitive to heat, moisture, vibration, and magnetism at the least and people want to cram 2TB of priceless family photos and their thesis paper into a $50 device without making backups.Certain files I keep in RAID5 on Corsair Nova SSD drives and I use the same drives in my laptops and they've done pretty well. Here, we have taken SanDisk as an example and categorized the usual problems that occurred on SanDisk USB flash drives, pen drives, micro SD cards, SDHC cards.Lately I've been using WD Caviar Black 1TB w/ 64MB cache drives in a Drobo Elite and they've been doing pretty well but I expect to lose a couple of them per year under the stress of being in a server. All data on your USB Flash drive will be permanently. This utility is an Advanced Memory Diagnostic Tool.Wouldn't hurt to have a drive stop working completely, unless a jumper is switched, when it senses itself dying so it won't self destruct further. The main expense of data restoration is getting exact matching parts for your drive so the manufacturer could do it MUCH cheaper and easier than anyone else. I think hard drive manufacturers should have to include free data restoration for the life of the warranty. One happened to die at the same time the main drive died which was unpleasant - both were about six months old.
Dell provided new drive on Friday and recovery was started - only to find that another original drive failed over the weekend too, rendering the storage dead. Few months later on Thursday one drive died. IT was in the beginning checking the HDDs too, only to find that most deliveries contain drives from several batches.Other company I have worked for got Dell servers and also RAID10. 1TB for $150 is fine with me - instead of offering me 2TB for the same price give me the built-in RAID1.If you put in an order for a large number of identical machines chances are they'll have components from the same batch.Our supplier of storage solution "randomizes" the batches. Data is way more valuable than hardware so every possible effort should be made to make data possible to recover. Recovering information directly from platters is magnitude(s) more expensive.And it's probably not the fault of the flash part anyway. If you have two drives from the same batch and one of them is dead - recovery would be relatively fast and cheap. Having *all* drives from different batches, as was explained to me by data recovery specialists, is also bad if one later would want to try to recover information from the dead drive's platters: different batches might have different controllers with different configurations making them irreplaceable. Thus, they're going to pick the fastest protocol and use it every time, without regard to what speed the USB side of the bridge is using for communication. Although flash drives do support multiple protocols, there's really no good reason for a flash controller to implement support for more than one protocol, as flash parts have to support all of them. Since the device stalls only when accessed at USB 2.0 speeds, that almost completely rules out the flash part as the culprit. Use mamp for multiple sites on wordpress macI was rather miserable using dd to manually work around bugs in a USB flash reader just a few years ago. USB card readers "just work". I'd be very surprised if that sort of failure were anything other than a junk flash reader.Now I know what you're thinking. Therefore, the fact that this card is even on the market is a pretty strong indication that the problem is on the other side of the USB bridge-either the USB bridge silicon itself, the USB cable, the host silicon, or drivers.Yes, lots of people are having trouble with those cards, but in every report, the failure was an outright controller failure, with all data lost, not problems accessing it at certain speeds. Thus, a failure caused by high throughput (in the absence of specific workarounds in the camera) would cause the card to be completely and totally nonfunctional in basically any real-world camera hardware. It will probably be dog slow, but at least you can copy the data off the card before you toss it out.Yes you can low level format flash drives. I'm guessing that's not an option, though.Worst comes to worst, if it worked okay with a camera, you could try using the camera's flash controller to read/write the flash part. If that doesn't help, *then* you can blame the flash part, and there probably isn't anything you can do about it other than ripping it open and making cufflinks out of it.If you have access to the flash reader firmware, you might try using a different access mode. Did I mention that this particular controller silicon was used for dozens of products by at least half a dozen major manufacturers for a couple of years before the flaw was discovered? Or that the bug was never fixed in firmware or silicon? :-) So yeah, a thoroughly broken flash reader would not be at all surprising.First thing I'd do is grab yourself a new flash reader and make sure it doesn't use the same chipset as the one you have. This may be a case of the manufacturer doing overclocking with some higher percentage of manufactured devices that just can't make it at that increased speed. It may be defective only at high speed or it may be defective at all speeds (if the speed can be forced lower). There is zero indication that it is a low level formatter.That said, the OPs problem may be more of a case of defective flash chips and/or defective drive emulation and/or defective interface to the computer via the SD pins. Maybe it formats the filesystem and adds some extra stuff afterwards. But the low level formatter would require low level access to do this, and the computer interface (SD slot pins, USB, etc) may not have a way to do this.The formatter on the SD Association site, however, appears to be nothing more than a specialized filesystem formatter. A low level format would clear the flash chips themselves and reset the drive emulation layer to initial state (most likely zero assigned blocks and a full pool of unassigned in the canonical order). (double or better) No idea why. Yes, rdisk is a character device I know I know, but for some reason os x io's a LOT faster o that than the block device. The above is for mac os x. Flash Memory Low Level Format Tool Update Its ChecksumThere's no such thing as a low level format for non magnetic media because flash drive blocks are electrically addressed, not physically.FWIW, you can probably tack on "count=20" to make things go much faster. All dd does is write zeros to the meat of the data block, and update its checksum. Low level format refers to laying down the address blocks, and also the data headers and trailers. Careful which device you're nuking, dd is both swift and unforgiving.I'd also like to get slightly pedantic and point out that this is NOT a low level format. Just plug in the correct disk number for the xxx. Bad blocks in NAND flash are even a bigger problem than on a magnetic disk, but using an error-correction mechanism implemented with a Hamming code and 'spare bits' for each block, the translation layer hides all of this to the user, presenting a 'perfect' storage area. The problem is that unless you have direct access to the SD controller - perhaps on a mobile phone like the N900, the USB mass storage abstraction hides completely this feature.Formatting using this command is usually very fast compared to writing to all existing blocks.The reason for that is that the card uses a translation layer to mask the physical deficiencies of the flash memory. See page 33 for the simplified specification. But then again your distro or whatnot may try to find a backup copy of the boot block and partition table etc at the end of the device in which case just wipe the whole thing to avoid it "fixing it" for you.There is definitely a special 'erase' command for SD-cards. Without this it will wipe the entire device, which for a flash drive may take a little bit.
0 Comments
Leave a Reply. |
AuthorWillis ArchivesCategories |