Random Freeze

Hello to all,
i've a problem.

In last month random freezes on my IBM server, with suse 10.1 installed.

IBM change almost hardware part, but problem remains...

only info in my .logs (2,4 Gb txt file) are thousand and thousand of these lines:
__________________________________________________ ________________________
...

Jun 4 00:00:00 crotalo kernel: printk: 15 messages suppressed.
Jun 4 00:00:00 crotalo kernel: sg_write: data in/out 404/404 bytes for SCSI command 0xd--guessing data in;
Jun 4 00:00:00 crotalo kernel: program java not setting count and/or reply_len properly
Jun 4 00:00:05 crotalo kernel: printk: 37 messages suppressed.
Jun 4 00:00:05 crotalo kernel: sg_write: data in/out 404/404 bytes for SCSI command 0xd--guessing data in;
Jun 4 00:00:05 crotalo kernel: program java not setting count and/or reply_len properly
Jun 4 00:00:10 crotalo kernel: printk: 15 messages suppressed.
Jun 4 00:00:10 crotalo kernel: sg_write: data in/out 404/404 bytes for SCSI command 0xd--guessing data in;
Jun 4 00:00:10 crotalo kernel: program java not setting count and/or reply_len properly
Jun 4 00:00:15 crotalo kernel: printk: 15 messages suppressed.

...
__________________________________________________ ________________________

some info about my system
IBM XSERIES 346 E-Server
Linux crotalo 2.6.16.13-4-smp #1 SMP ... i686 i686 i386 GNU/Linux
xeon CPU
scsi mirror

thank you for any info about this problem,

M.