I need upgrade switch mds9124 for compatibility with San Volume Controller 7.4
Now  NX-OS on MDS switch is :

  kickstart: version 5.0(4d)
  system:    version 5.0(4d)

Command for view NX-OS is “show ver”

After this i have checked free space on bootflash dir:

dir bootflash:

       315    May 19 09:04:25 2010  MDS20100519015906567.lic
        315    May 19 09:05:15 2010  MDS20100519020136847.lic
        318    May 19 09:05:51 2010  MDS20100519020443144.lic
      46080    Aug 17 21:36:20 2011  lost+found/
   18832896    May 18 10:57:02 2010  m9100-s2ek9-kickstart-mz.4.2.5.bin
   18788352    Aug 17 21:33:05 2011  m9100-s2ek9-kickstart-mz.5.0.4d.bin
   52767390    May 18 11:03:06 2010  m9100-s2ek9-mz.4.2.5.bin
   56800543    Aug 17 21:30:34 2011  m9100-s2ek9-mz.5.0.4d.bin
       2064    Aug 17 21:41:19 2011  mts.log

Usage for bootflash://sup-local
  160452608 bytes used
    2519040 bytes free
  162971648 bytes total

In this switch i have less free space. I need old version.

MDS-CP-02# del bootflash:m9100-s2ek9-kickstart-mz.4.2.5.bin
MDS-CP-02# del bootflash:m9100-s2ek9-mz.4.2.5.bin

Ok i am ready to load news fw in to bootflash dir i use tftp server:
copy tftp://10.1.1.207/m9100-s2ek9-kickstart-mz.5.2.8e.bin bootflash:m9100-s2ek9-kickstart-mz.5.2.8e.bin
copy tftp://10.x.x.x/m9100-s2ek9-mz.5.2.8e.bin bootflash:m9100-s2ek9-mz.5.2.8e.bin