https://community.hpe.com/t5/netservers/netraid-power-supply/m-p/2932494#M4512 Hi all!<BR />I have LH3 and LH4 servers with integrated NetRAID controller with 16Mb memory onboard.<BR /><BR />I have "wrthru" cache policy because it save data cache in case power failure. I need to now:<BR />1. Do I have battery in netraid by default or I need to buy it separately?<BR />2. Where can I find more info about this options(battery) on HP?<BR /><BR />Thanks in advance.<BR /> Fri, 21 Mar 2003 02:27:33 GMT Dmitry_15 2003-03-21T02:27:33Z https://community.hpe.com/t5/netservers/netraid-power-supply/m-p/2932494#M4512 Hi all!<BR />I have LH3 and LH4 servers with integrated NetRAID controller with 16Mb memory onboard.<BR /><BR />I have "wrthru" cache policy because it save data cache in case power failure. I need to now:<BR />1. Do I have battery in netraid by default or I need to buy it separately?<BR />2. Where can I find more info about this options(battery) on HP?<BR /><BR />Thanks in advance.<BR /> Fri, 21 Mar 2003 02:27:33 GMT https://community.hpe.com/t5/netservers/netraid-power-supply/m-p/2932494#M4512 Dmitry_15 2003-03-21T02:27:33Z https://community.hpe.com/t5/netservers/netraid-power-supply/m-p/2932495#M4513 Dmitry,<BR /><BR />I did some research and learned that the LH3/3r and LH4/4r *DO NOT* have any battery backup for the integrated Netraid controller cache. (I think that this is why all of the config guides stress using write-through cache policy on the integrated Netraid...)<BR /><BR />Certainly, having the server on a UPS is a good idea for a number of reasons. This would be one more good reason.<BR /><BR />If you really want battery-backed Netraid cache, it looks like you would need to use a separate Netraid 3si, 4si or Netraid "M" product.<BR /><BR />BTW, the LH3000 and LH6000 apparently have battery backup for the Netraid cache.<BR /><BR />Regards,<BR /><BR />Dave Fri, 21 Mar 2003 17:23:27 GMT https://community.hpe.com/t5/netservers/netraid-power-supply/m-p/2932495#M4513 Dave Unverhau_1 2003-03-21T17:23:27Z