SCSI Error - Mailing list pgsql-hackers

Hiya Lists.... 

Somebody could help me? I am with an error when the Postgresql makes Insert, 
Delete or Update 

kernel: SCSI disk error : host 2 channel 0 id 0 lun 0 return code = 70000
kernel:  I/O error: dev 08:08, sector 47938856
kernel: SCSI disk error : host 2 channel 0 id 0 lun 0 return code = 70000
kernel:  I/O error: dev 08:08, sector 47938800
kernel: SCSI disk error : host 2 channel 0 id 0 lun 0 return code = 70000
kernel:  I/O error: dev 08:08, sector 47938864
kernel: SCSI disk error : host 2 channel 0 id 0 lun 0 return code = 70000
kernel:  I/O error: dev 08:08, sector 47938872
kernel: SCSI disk error : host 2 channel 0 id 0 lun 0 return code = 70000
kernel:  I/O error: dev 08:08, sector 47938808

Version:

postgresql-7.2.1-5
postgresql-devel-7.2.1-5
postgresql-libs-7.2.1-5
postgresql-server-7.2.1-5

Server:

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 11
model name      : Intel(R) Pentium(R) III CPU family      1266MHz
stepping        : 1
cpu MHz         : 1258.309
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 mmx fxsr sse
bogomips        : 2510.02

Kernel:

Linux version 2.4.7-10custom (gcc version 2.96 20000731 (Red Hat Linux 7.1 
2.96-98)) #9 Mon
Sep 16 17:50:13 BRT 2002

Mem Info       total:    used:    free:  shared: buffers:  cached:
Mem:  789540864 782589952  6950912 81764352 34406400 583122944
Swap: 802873344  2957312 799916032
MemTotal:       771036 kB
MemFree:          6788 kB
MemShared:       79848 kB
Buffers:         33600 kB
Cached:         566568 kB
SwapCached:       2888 kB
Active:          14476 kB
Inact_dirty:    664852 kB
Inact_clean:      3576 kB
Inact_target:      136 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       771036 kB
LowFree:          6788 kB
SwapTotal:      784056 kB
SwapFree:       781168 kB
NrSwapPages:    195292 pages

pci
Bus  2, device   9, function  0:   SCSI storage controller: Adaptec 7899P (rev 1).     IRQ 10.     Master Capable.
Latency=96. Min Gnt=40.Max Lat=25.     I/O at 0x2100 [0x21ff].     Non-prefetchable 64 bit memory at 0xedfff000
[0xedffffff].

Swap

Filename                        Type            Size    Used    Priority
/dev/sda6                       partition       784056  2888    -1

Tkanksfull
-- 
Ricardo Fogliati
4 Linux/Vesper