<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Sat, Feb 16, 2013 at 8:36 PM, Robin Gilks <span dir="ltr"><<a href="mailto:g8ecj@gilks.org" target="_blank">g8ecj@gilks.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I do find it odd that a Raid 1 system is so slow - my Raid 5 system, which<br>
in theory is 1/4 the speed (at best!) handles 8 simultaneous recording OK<br>
with a mixture of DVB-T, DVB-S and analog off a set=top box.<br>
<br></blockquote><div><br></div><div>RAID1 and RAID5 have theoretically identical write performance - the same as the speed of the slowest disk. In practice it'll be slightly slower just because there are more disks involved.<br>
</div><div><br></div><div>If it's only happening with multiple recordings then it probably is a performance issue. But it's unlikely to be the disks themselves. I've had as many as 3 recordings plus the database writing to a single disk without issue (admittedly only SD, but also an old disk with relatively lower performance by modern standards). Personally I'd suspect LVM, and I must ask, why are you using LVM at all?<br>
<br></div><div>Cheers,<br>Steve<br></div></div></div></div>