Hardware 512GB SD Card H2testw

phelen · Feb 13, 2020

It seems the card is legit but the test says the media is likely to be defective due to 2.4 MByte DATA LOST (5102 sectors). Does this mean the card is dying?

Warning: Only 488334 of 488335 MByte tested.
The media is likely to be defective.
476.8 GByte OK (1000102930 sectors)
2.4 MByte DATA LOST (5102 sectors)
Details:0 KByte overwritten (0 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
2.4 MByte corrupted (5102 sectors)
0 KByte aliased memory (0 sectors)
First error at offset: 0x0000001559036200
Expected: 0x0000001559036200
Found: 0x6200620062006200
H2testw version 1.3
Writing speed: 15.9 MByte/s
Reading speed: 17.6 MByte/s
H2testw v1.4

lone_wolf323 · Feb 13, 2020

phelen said:
It seems the card is legit but the test says the media is likely to be defective due to 2.4 MByte DATA LOST (5102 sectors). Does this mean the card is dying?

Warning: Only 488334 of 488335 MByte tested.
The media is likely to be defective.
476.8 GByte OK (1000102930 sectors)
2.4 MByte DATA LOST (5102 sectors)
Details:0 KByte overwritten (0 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
2.4 MByte corrupted (5102 sectors)
0 KByte aliased memory (0 sectors)
First error at offset: 0x0000001559036200
Expected: 0x0000001559036200
Found: 0x6200620062006200
H2testw version 1.3
Writing speed: 15.9 MByte/s
Reading speed: 17.6 MByte/s
H2testw v1.4

Was the card fully empty? If it was. then yes. the sd card is slowly going bad.

phelen · Feb 13, 2020

Yes it was empty, I try again but it took forever the 1st time. Currently using fakeflashtest

Clydefrosch · Feb 13, 2020

was the card new? you might be able to have it replaced.
and you could try to repair those sectors (my computer > right click the drive > properties > tools)

unfortunately, large sd cards take forever to be checked, do it overnight if you want to stay sane

phelen · Feb 13, 2020

Its used but I trust the person who sold to me.

TurdPooCharger · Feb 13, 2020

@phelen, damn bro. So the results basically states your 512 GB card is authentic, but it has dead nand cells.

You can check again for more thoroughness.

Copy everything off the 512 GB SD card to a computer.
Reformat the card with an initial pass using SD Memory Card Formatter.
- This program revives SD cards that have softlocked (ie, certain instants of read-only mode or not recognized by Windows File Explorer).
Quadruple reformat the card.
- Because of its massive capacity (at least 128 GB in size), use 64 KB cluster size instead of 32 KB.
Full Write + Verify the empty card with H2testw.
- Run this test on a computer with a built-in SD card reader.
- Don't use a SD-to-USB adapter in case yours is something like those shitty & unreliable T-FLASH.
- If your card is microSD, use a different micro-to-standard SD adapter.

phelen · Feb 13, 2020

TurdPooCharger said:
@phelen, damn bro. So the results basically states your 512 GB card is authentic, but it has dead nand cells.

You can check again for more thoroughness.

Copy everything off the 512 GB SD card to a computer.

Reformat the card with an initial pass using SD Memory Card Formatter.

This program revives SD cards that have softlocked (ie, certain instants of read-only mode or not recognized by Windows File Explorer).

Quadruple reformat the card.

Because of its massive capacity (at least 128 GB in size), use 64 KB cluster size instead of 32 KB.

Full Write + Verify the empty card with H2testw.

Run this test on a computer with a built-in SD card reader.

Don't use a SD-to-USB adapter in case yours is something like those shitty & unreliable T-FLASH.

If your card is microSD, use a different micro-to-standard SD adapter.

Oh snap I was using a SD-to-USB adapter, does that make a difference.

pipezierra · Feb 13, 2020

Well... i saw that in too many micro sd cards, in mini tool partition wizard erase all partitions and create a new one exfat with a blank space of 24 or 56 mb (unallocated space before), do that and try again

phelen · Feb 13, 2020

pipezierra said:
Well... i saw that in too many micro sd cards, in mini tool partition wizard erase all partitions and create a new one exfat with a blank space of 24 or 56 mb (unallocated space before), do that and try again

Will do thanks

TurdPooCharger · Feb 13, 2020

phelen said:
Oh snap I was using a SD-to-USB adapter, does that make a difference.

Typically, a SD-to-USB adapter is not a problem if the adapter is a high quality one / not a stupid cheap one with a garbage host controller chip.

Because your card is so big, it's not out of the realm of possibility your adapter overheated and derped out from all that writing and reading back all those ~475 GB.

It's good to check again the card with a different setup kinda like you asking us for a second opinion.

phelen · Feb 13, 2020

TurdPooCharger said:
Typically, a SD-to-USB adapter is not a problem if the adapter is a high quality one / not a stupid cheap one with a garbage host controller chip.

Because your card is so big, it's not out of the realm of possibility your adapter overheated and derped out from all that writing and reading back all those ~475 GB.

It's good to check again the card with a different setup kinda like you asking us for a second opinion.

Thanks, I do appreciate it I have to borrow my sister's laptop as it has a microsd slot so I verify it there.

Hardware 512GB SD Card H2testw

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