03-31-2015 09:22 AM - edited 03-31-2015 09:28 AM
However, how weird is it that SanDisk doesn't care to provide a Tool to help users store >4GB files
on the most common File System?
Actually they do. It's called 64GB flash drives formatted in the factory as exFAT, which supports files larger than 4GB. Unfortunately they haven't found ways to prevent users from blindly reformatting them with even trying them. Then complaining about the drive they screwed up.
(Silly ideas these customers ... )
That's one way to describe them.
BTW Current versions of Windows have support for formatting removable drives as exFAT built in. No need to hunt for something else.
Important files = Backed up files
04-01-2015 05:30 AM
First sorry for bumping old thread. (oh wait somone beat me to it yesterday!)
So i just browsed aliexpress for some cheap chinese usb drive for a keychain. In description the seller wrote :
"You'd better not format your U disk causually because it is harmful." (nice engrish)
I tried searching google for "does formatting damage flash drive", and then i remembered this old thread.
It seems like the common knowledge and advice out there is : Go ahead format all you like, it only wears as much on your drive as a normal data write would. You have to dig a little deeper to find the skeptics. A few people on forums mention that some manufacturers now warn against formatting their drives.
But one thing i did learn was that formating or converting to NTFS is a bad bad idea (because of constant and increased activity) - not sure this was clarified in this thread.
So to summarize:
1. Formating your drive makes it lose the custom logical block offset which was put in to provide (sometimes radically) improved transfer speeds.
1. Don't use the built in windows format. Use HP USB Disk Storage Format Tool for example.
2. Use stock filesystem, if absolutely needed format to Fat16, fat32 or exFat as Ed_p said. Avoid NTFS at all cost
4. If still too slow, try different block sizes.
5. Ed_p is a tough nut to dance with, but he is alright after all
04-01-2015 05:48 AM
04-20-2015 09:47 AM
To all that flame people for formatting a flash drive or sd card:
I would rather format a drive over deleting 30,000 puny files and folders from a flash media. Formatting (quick format) only takes 30 seconds. Deleting 30,000 files can take forever.
04-20-2015 10:42 AM
most above average users would just look at the fat32 and format it right away.
Not if they are young users. They buy something, expect it to work and use it. Only if there is a problem do they look for something that may fix it.
You need specialised technical knowledge to know not to do this.
No, you just need to have less free time.
And congrats you now ruined your expensive 64 gb flashdrive,
Have you written to Microsoft informing them their Windows 7 utility has ruined your flash drive?
What format did the Windows 7 utility format the USB drive as? NTFS? Can you convert it back to exFAT and not loose the Windows 7 boot capability?
Since you seem a bit technical here's another option. The Windows boot functions create an ISO file before writing it to the CD/DVD/USB drive. Rather than have Windows write it to the USB drive, stop the function, then manually reformat the drive to exFAT and use RMPrepUSB to make the drive bootable and put the ISO file on the drive. I believe RMPrepUSB supports that without reformating the drive.
I would rather format a drive over deleting 30,000 puny files and folders from a flash media.
30,000!! Wow!! That's a lot of files. Since I have never had to do that many on a USB drive I can't imagine how long it would take. If you're happier with reformatting then by all means do it.
Important files = Backed up files
08-10-2015 10:34 PM - edited 08-10-2015 10:40 PM
I've seen a lot of people post about slowness on their speedy drive.
There are a few reasons for why this is happening:
1: It's plugged in a USB 2.0 slot. Generally, USB 3.0 slots are marked with a blue color, or they will have "SS"/"SuperSpeed" logo near them. Sometimes they will not, but this is fairly rare.
2: Chipset drivers. This is fairly common with fresh installs of windows 7, and sometimes with windows 8 depending on how new the motherboard is. Install USB 3.0 drivers and the speed will come back.
3: The device you are reading or writing to just isn't fast enough. This is going to be the most common reason the transfer is slow for platter drives. The fastest platter drive with zero fragmentation is going to max out around 150-170 MB/s, the average consumer drive is going to be closer to 100-120 MB/s, and when fragmentation is thrown in that could be as low as 30-70 MB/s.
Sector size is a bunch of crap. I've set my device to NTFS 4k, NTFS 32k, FAT32 32k, all 3 had the same sustained transfer rates of around 190 MB/s. Sure, there may be minor differences, and I suppose in the right situation/environment it could make a significant difference, but for a majority of people it will not change anything. Which, if you guys want an easy way to format the device into whatever file system - Rufus - http://rufus.akeo.ie/ will do anything you want.
4: The Sandisk Extreme 64 GB is literally a SSD hard drive on a USB Stick, except that there is no easy way to force the drive to perform a TRIM operation. - https://en.wikipedia.org/wiki/Trim_(computing)
#4 is the one that will catch people eventually. The lack of trim support in windows really hurts the speed of the drive over time. Formatting the drive will not fix this, no matter how you format the drive. As the drive is used over time, and files are deleted in windows from the drive, windows never tells the controller on the drive where it has deleted files. So, it starts to stumble over itself trying to find empty space to put new files.
I'm honestly not sure if there is a way to force TRIM on the drive. However, there is a workaround, but unfortunately it's not the easiest thing to do.
SecureErase sends a command to the controller on the SSD, telling it to "shock" the drive and wipe everything on it. This resets everything on the drive, and effectively makes it brand-new again. Just be warned that it will not have a file system, it will be a raw drive that you will have to format to NTFS/FAT32.
Also, be warned that there are a lot of programs that use the words "SecureErase", but they do not perform the function I mention above.
Unfortunately the only easy way to do this command is with parted magic.
Parted magic is so far the only thing I have seen that correctly sees the Flash drive as a SSD device with secure erase capability. However, it works. After a month of heavy-use, I was starting to get 20-30 MB/s write speeds on my device, and after running parted magic, the device was back to 190 MB/s.
(Part of the reason I'm posting here is hoping that someone has found a way to force trim/secureerase inside of Windows. )
08-23-2015 10:43 AM
Something that may throw a wrench in secure erasing the sandisk drive. I didn't notice this because I have an SSD already in my computer, but apparently Parted Magic will not allow you to secure erase the Sandisk USB Drive if it cannot detect a hard drive with the capability to secure erase itself. It just disables that menu, not checking to see if the usb devices can, I guess.
After that, the USB devices will show up.
10-11-2015 08:24 AM
Still have not a true answer, why i need care about my USB so much like that, i'm not a super advance user, why i need care about how to format my usb in a right way. after all my Extreme Pro sitll have 40MB/s speed (while it should 240Mb/s)