We had issues like this 18 months ago. It coincided with us adding some new HBAs to balance the load. It transpired that one of the HBAs was silently corrupting the data as it was writing it to tape. We only realised when we came to read the data back. The problem was that the same HBA was being used to write data to both the local (primary) and remote (copy) storage pools over a long-distance SAN, so we lost some data.
Once we identified the HBA as the source of the problem and removed it, we then had the task of identifying every tape that had been written using it. Almost all were bad! We deleted the copy tapes and for primary tapes, we restored from copy tapes where possible. The HBA - an Emulex LP9802 - was described as having 'end-to-end parity protection' but this didn't work for us. I opened a PMR, but IBM made the observation that they are not responsible for the data after it has been passed to the HBA. So maybe one of your SCSI/FC adapters has gone bad? Regards Neil Schofield Yorkshire Water Services Ltd. Let us know when you're moving house on-line at www.yorkshirewater.com YORKSHIRE WATER - WINNER OF THE UTILITY OF THE YEAR AWARD The information in this e-mail is confidential and may also be legally privileged. The contents are intended for recipient only and are subject to the legal notice available at http://www.keldagroup.com/email.htm Yorkshire Water Services Limited Registered Office Western House Halifax Road Bradford BD6 2SZ Registered in England and Wales No 2366682
