Partition on part of hard drive no longer recognized

Hi all.

I've had my partitions over several drives set for many months. Suddenly on boot this morning, one of the partitions isn't recognized by Windows (7 64-bit). My partition software (EaseUS Partition Manager Pro) does "see" it and shows the correct division of used and unused space. This is an NTFS partition with 11.86 GB capacity and 2.50 GB used. The status is None and the type is logical.

The error message box title is "Location is not available". The message is:
H:\ is not accessible.
The file or directory is corrupted and unreadable.

I've had no activity in this partition for several days. The partitions on either side are fine (fingers crossed they stay that way!). They same the same characteristics (although obviously different capacities) as the missing partition.

I'd really like to get those files; not positive my backup is the very latest.

Help will be much appreciated. As always.

Thanks.

Well I've got my partition back. First I tried restoring to two days before the problem started. That didn't work; my partition still wasn't "seen". Then I went into my partition software (EaseUS Pro) and asked it to check the partition. It checked the partition properties, ran chkdsk and did a surface test. It didn't find errors but it did correct the problem.