I have a Dell Poweredge R730XD with 24 x 1.2tb ST1200MM0088 (2.5, SAS 12Gbp 10K) disks in multiple raid 5 partitions.

One disk has failed - I have a brand new ST1200MM0099 disk available to replace the faulty drive. This appears to be the same size and specification? My question is if I hot swap the faulty ST1200MM0088 disk with the ST1200MM0099 will the system fail? What will the difference in performance be? (slowdown?)

Thanks, Tony

  • As far as I remember, changing disk with the same capacity will work fine. Even if the biggest drive were replaced, the rebuild will start from 0 and possibly the RAID rebuild can fail. So if everything is the same (except the SN) you can easily change it :) Oct 12, 2018 at 15:45

1 Answer 1


If the drive is a 2.5 inch, 12Gbps SAS, 10K RPM, with the same size, then you can replace the old disk with the new one with no issue.

Edit: Actually Dell Says you can mix the bus speed and the spindle speed

NOTE : Mixing disks of different speeds (7,200 rpm, 10,000 rpm, or 15,000 rpm) and bandwidth (3 Gbps or 6 Gbps) PCIe while maintaining the same drive type (SAS or SATA) and technology (HDD or SSD) is supported.

Page 9: https://downloads.dell.com/manuals/common/rc_h310_h710_h710p_h810_ug_en-us.pdf

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .