: The system can scale up to 192 drives (or 96 depending on expansion unit version) by daisy-chaining EXP3512 or EXP3524 expansion enclosures. Installation and Maintenance Procedures
Can I mix SAS and SATA drives in a DS3512? A: No. The DS3512 backplane is SAS-only. SATA drives require an interposer (which IBM never certified for DS3500). Use IBM-labeled SAS or NL-SAS drives only.
The rebuild counter climbed. 30%. 45%.