Earlier this morning, store.exe fuzzled up in one way or another, which necessitated a restart of our Exchange server. It came back online with no errors or problems, all the transaction logs replayed successfully, and all the stores mounted as normal. To me, it was just one of those random crashes; however, our consultant suspects it was caused by corruption in one of the stores. Perhaps he's correct, since he has far more experience than me, but that's not the point.

To fix the suspected errors, he's planinng to run an ESEUTIL defrag (via PerfectDisk) to fix them, which he claims will also fix any errors present.

From what I understand, defrag, verify, and repair are 3 separate actions, and a defrag does not imply any kind of integrity check. Is this correct? Are there any dangers of running a straight-up defrag on a database that might be corrupt?

Edit:

Here's the first error in the event log, which indicated the start of the problems we were having. Anyone know what it might indicate?

Event Type: Error
Event Source:   Microsoft Exchange Server
Event Category: None
Event ID:   1000
Date:       11/23/2011
Time:       8:15:47 AM
User:       N/A
Computer:   SERVER
Description:
Faulting application exsp.dll, version 6.5.7638.1, stamp 430e735b, faulting module kernel32.dll, version 5.2.3790.4480, stamp 49c51f0a, debug? 0, fault address 0x0000bef7.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 00 70 00 70 00 6c 00   A.p.p.l.
0008: 69 00 63 00 61 00 74 00   i.c.a.t.
0010: 69 00 6f 00 6e 00 20 00   i.o.n. .
0018: 46 00 61 00 69 00 6c 00   F.a.i.l.
0020: 75 00 72 00 65 00 20 00   u.r.e. .
0028: 20 00 65 00 78 00 73 00    .e.x.s.
0030: 70 00 2e 00 64 00 6c 00   p...d.l.
0038: 6c 00 20 00 36 00 2e 00   l. .6...
0040: 35 00 2e 00 37 00 36 00   5...7.6.
0048: 33 00 38 00 2e 00 31 00   3.8...1.
0050: 20 00 34 00 33 00 30 00    .4.3.0.
0058: 65 00 37 00 33 00 35 00   e.7.3.5.
0060: 62 00 20 00 69 00 6e 00   b. .i.n.
0068: 20 00 6b 00 65 00 72 00    .k.e.r.
0070: 6e 00 65 00 6c 00 33 00   n.e.l.3.
0078: 32 00 2e 00 64 00 6c 00   2...d.l.
0080: 6c 00 20 00 35 00 2e 00   l. .5...
0088: 32 00 2e 00 33 00 37 00   2...3.7.
0090: 39 00 30 00 2e 00 34 00   9.0...4.
0098: 34 00 38 00 30 00 20 00   4.8.0. .
00a0: 34 00 39 00 63 00 35 00   4.9.c.5.
00a8: 31 00 66 00 30 00 61 00   1.f.0.a.
00b0: 20 00 66 00 44 00 65 00    .f.D.e.
00b8: 62 00 75 00 67 00 20 00   b.u.g. .
00c0: 30 00 20 00 61 00 74 00   0. .a.t.
00c8: 20 00 6f 00 66 00 66 00    .o.f.f.
00d0: 73 00 65 00 74 00 20 00   s.e.t. .
00d8: 30 00 30 00 30 00 30 00   0.0.0.0.
00e0: 62 00 65 00 66 00 37 00   b.e.f.7.
00e8: 0d 00 0a 00               ....