https://community.hpe.com/t5/automated-backup/dat24x6-autoloader/m-p/105437#M222 C1559A is the product number for a HP DDS3 external autoloader.<BR /> <BR /> C1557A is not a valid product number. However, it is the product inquiry string (on SCSI) for *all* the HP DDS3 autoloaders (internal/external, windows/unix, etc).<BR /> <BR /> Your product should have a product number like C1559x, C5677x, C6367x, etc).<BR /> <BR /> Here's the current DDS3 products: <A href="http://www.hp.com/products1/storage/products/automatedbackup/autoloaders/dat24x6/index.html" target="_blank" rel="nofollow">http://www.hp.com/products1/storage/products/automatedbackup/autoloaders/dat24x6/index.html</A><BR /> <BR /> DDS4 autoloaders are also available, which will read DDS3 written tapes. Mon, 08 Jul 2002 14:44:34 GMT CA713937 2002-07-08T14:44:34Z https://community.hpe.com/t5/automated-backup/dat24x6-autoloader/m-p/105436#M221 Can anyone tell me what differences there might be between the C1557A and the C1559A? The C1559A is the current model. We have a C1557A on our Unisys mainframe (a Win2K with MCP), and need to purchase another HP autoloader for another system. We would like the new one we purchase to serve as a backup for the existing unit on the mainframe, and need to know if there are any differences that might cause a problem with that.<BR /> Wed, 03 Jul 2002 18:24:22 GMT https://community.hpe.com/t5/automated-backup/dat24x6-autoloader/m-p/105436#M221 Celeste Capone 2002-07-03T18:24:22Z https://community.hpe.com/t5/automated-backup/dat24x6-autoloader/m-p/105437#M222 C1559A is the product number for a HP DDS3 external autoloader.<BR /> <BR /> C1557A is not a valid product number. However, it is the product inquiry string (on SCSI) for *all* the HP DDS3 autoloaders (internal/external, windows/unix, etc).<BR /> <BR /> Your product should have a product number like C1559x, C5677x, C6367x, etc).<BR /> <BR /> Here's the current DDS3 products: <A href="http://www.hp.com/products1/storage/products/automatedbackup/autoloaders/dat24x6/index.html" target="_blank" rel="nofollow">http://www.hp.com/products1/storage/products/automatedbackup/autoloaders/dat24x6/index.html</A><BR /> <BR /> DDS4 autoloaders are also available, which will read DDS3 written tapes. Mon, 08 Jul 2002 14:44:34 GMT https://community.hpe.com/t5/automated-backup/dat24x6-autoloader/m-p/105437#M222 CA713937 2002-07-08T14:44:34Z