https://community.hpe.com/t5/proliant-servers-ml-dl-sl/expand-array-on-smart-array-p400i/m-p/4791055#M111869 you must exactly have the kit <BR />and this are spare parts<BR /><BR />398648-001 SPS-BD,BATTERY,CHARGER,MOD,4X V500HTX<BR />405835-001 sps-bd sa ddr 2x72,512MB<BR /><BR />405831-001 VERT INT,SAS SA I400 CNTRL Mon, 23 May 2011 14:30:00 GMT pis 2011-05-23T14:30:00Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/expand-array-on-smart-array-p400i/m-p/4791054#M111868 Hi,<BR /><BR />I have a HP Smart Array P400i and I would like to add a drive and expand my RAID5 disk array but I read that I need to have write cache enabled and the 512MB BBWC upgrade installed. Is that correct information?<BR />If that is correct; is the following parts the one that I should buy: 405148-B21 and 417836-B21?<BR />Can I install these without loss of data?<BR /><BR />Best regards,<BR />stroba Mon, 23 May 2011 10:19:27 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/expand-array-on-smart-array-p400i/m-p/4791054#M111868 stroba 2011-05-23T10:19:27Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/expand-array-on-smart-array-p400i/m-p/4791055#M111869 you must exactly have the kit <BR />and this are spare parts<BR /><BR />398648-001 SPS-BD,BATTERY,CHARGER,MOD,4X V500HTX<BR />405835-001 sps-bd sa ddr 2x72,512MB<BR /><BR />405831-001 VERT INT,SAS SA I400 CNTRL Mon, 23 May 2011 14:30:00 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/expand-array-on-smart-array-p400i/m-p/4791055#M111869 pis 2011-05-23T14:30:00Z