Archiving

Oracle 7.3.2 on SPARC Solaris 2.5

in ?/dbs/init$SID.ora:
LOG_ARCHIVE_DEST=/vol01/ora_arch
LOG_ARCHIVE_FORMAT=rs%T

Why file size is different in the following list? Will it be OK to restore database with this redologs?[Please CC to vic_at_goblin.rosprint.ru]

ls -l /vol/ora_arch
...
-rw-r----- 1 oracle dba 510464 Jun 4 15:28 rs0000017303
-rw-r----- 1 oracle dba 512000 Jun 4 18:09 rs0000017304
-rw-r----- 1 oracle dba 512000 Jun 4 18:09 rs0000017305
-rw-r----- 1 oracle dba 512512 Jun 4 18:09 rs0000017306
-rw-r----- 1 oracle dba 512000 Jun 4 18:09 rs0000017307
-rw-r----- 1 oracle dba 511488 Jun 4 18:09 rs0000017308
-rw-r----- 1 oracle dba 512512 Jun 4 18:10 rs0000017309
-rw-r----- 1 oracle dba 512512 Jun 4 18:10 rs0000017310
-rw-r----- 1 oracle dba 512000 Jun 4 18:10 rs0000017311
-rw-r----- 1 oracle dba 512000 Jun 4 18:10 rs0000017312
-rw-r----- 1 oracle dba 512512 Jun 4 18:11 rs0000017313
-rw-r----- 1 oracle dba 512000 Jun 4 18:11 rs0000017314
-rw-r----- 1 oracle dba 512512 Jun 4 18:11 rs0000017315
-rw-r----- 1 oracle dba 512512 Jun 4 18:11 rs0000017316
-rw-r----- 1 oracle dba 512512 Jun 4 18:12 rs0000017317
-rw-r----- 1 oracle dba 512512 Jun 4 18:12 rs0000017318
-rw-r----- 1 oracle dba 512512 Jun 4 18:12 rs0000017319
-rw-r----- 1 oracle dba 512512 Jun 4 18:12 rs0000017320
-rw-r----- 1 oracle dba 512000 Jun 4 18:13 rs0000017321
-rw-r----- 1 oracle dba 512512 Jun 4 18:13 rs0000017322
-rw-r----- 1 oracle dba 512512 Jun 4 18:13 rs0000017323
Received on Wed Jun 04 1997 - 00:00:00 CDT