Brand New SSD Bad Block Count on CrystalDiskInfo

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bariscokmar

Mar 14, 2018
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Hello,

CzDwznP.png


Okay, I installed CrystalDiskInfo and it shows Total Bad Block = 298, Max Bad Block/Die = 31
This SSD is brand new, as you can see it has only 9 hours on power. Is it a problem or why did this happen? What it means?

and Unexpected Power Loss = 2 what it means?
and any other problems within the screenshot?

Thanks for help.
 
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InvalidError
Bad blocks on SSDs are normal, especially on more cost-sensitive drives where aiming for all 100%-good dies would significantly inflate prices. That's why there are "spare blocks" to remap them to. Reallocated is still zero and spare remaining is still 100%, so no real problem there.

For the power loss, that simply means that power to the drive got cut off before the OS put the drive in power-down state during shutdown or hibernate first.
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InvalidError

Titan
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May 18, 2007
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Bad blocks on SSDs are normal, especially on more cost-sensitive drives where aiming for all 100%-good dies would significantly inflate prices. That's why there are "spare blocks" to remap them to. Reallocated is still zero and spare remaining is still 100%, so no real problem there.

For the power loss, that simply means that power to the drive got cut off before the OS put the drive in power-down state during shutdown or hibernate first.
 
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bariscokmar

Mar 14, 2018
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I see, but isn't it too much for a new SSD? Like 298 bad blocks, even 31 died or something like that. It's Sandisk Ultra 3D 500 GB. Should I do anything? Like contacting to SanDisk?
 
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InvalidError

InvalidError

Titan
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May 18, 2007
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SanDisk will tell you to run its dashboard's diagnostic routine and request the error code before authorizing an RMA. If the diagnostic does not return an error code, then SanDisk will most likely decline any service.

I have a 480GB SanDisk Extreme Pro SSD and it has 36 bad blocks on it. Even the premium line isn't necessarily defect-free.
 
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bariscokmar

Mar 14, 2018
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Both Long and Short SMART Diagnostics tests are fine.

I think you're right... I wish we could see 0 bad blocks. I have a friend who has 120 GB Toshiba SSD, he has 0 bad blocks after 6 months. That's interesting and some questioning fact on choosing SanDisk next time.
 
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