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"Cannot access external HD ", I'm having some issues accessing the data on my external hard drive. It's a 3TB Seagate, purchased a couple years ago, should have ~2TB of data on it. It was plugged into a desktop, and I believe the power failed during a file transfer. The drive is in good physical condition and sounds normal. Currently Windows 7 recognizes the drive but when I try to open it, it asks me to format the drive. Sometimes it says cyclic redundancy check. I don't format it as I need to access my data. When running chkdsk /r, it hangs on "CHKDSK is verifying Usn journal" for hours, then eventually returns "Insufficient disk space to fix the Usn Journal $J data stream." Does anyone know what this means? Looking online I've seen suggestions to delete the Usn journal using fsnutil, but I wonder if this is safe. We also plugged it directly into a desktop using SATA and ran the Spinrite software. It went through the whole drive and didn't find any bad blocks, but the above symptoms are still happening. Also, Disk Management thinks the format is RAW, but CHKDSK always correctly recognizes it as NTFS.
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support FAT32 EXFAT NTFS and RAW file system
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