On Tue, 2009-08-18 at 06:25 -0700, Greg KH wrote: > On Tue, Aug 18, 2009 at 09:18:30AM -0400, Ric Wheeler wrote: > > > > We have a new toy to test very large & slow storage with built up from 5 > > SAS expansion shelves (Promise Vtrak J-Class) with 60 S-ATA drives and > > 16 SAS drives (the S-ATA drives each have a Promise Vtrak S-ATA MUX > > adapter daughter card in the disk sled). > > > > The basic idea is to build a cheap & slow test bed for file & storage > > system scalability. Collectively, we have about 120TB (raw) of capacity > > to play with in one server. > > > > As we work through various issues, a couple of oddities popped out. > > > > The first is that udev grumbles during boot about "file name too long" > > like the following: > > > > Aug 17 06:49:58 megadeth udevd-event[20447]: unable to create db file > > '/dev/.udev/db/\x2fdevices\x2fpci0000:00\x2f0000:00:04.0\x2f0000:17:00.0\x2f0000:18:0a.0\x2f0000:1f:00.0\x2fhost11\x2fport-11:0\x2fexpander-11:0\x2fport-11:0:0\x2fexpander-11:1\x2fport-11:1:0\x2fexpander-11:2\x2fport-11:2:17\x2fexpander-11:3\x2fport-11:3:1\x2fend_device-11:3:1\x2fbsg\x2fend_device-11:3:1': > > File name too long > > Odd, what is the sysfs tree for this device? You have expanders > attached to ports attached to expanders? How deep can you go? In terms of tree depth, there's no real limit (although the deeper it goes, the slower the network). The examples in the docs usually go about 4 expanders deep. James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
