Dear Sirs. I want to split my question into two parts. The first one is highly FreeBSD dependend, the second one is a kind of SOS out into the SCSI guru world. First part. Prior to this date I worked with some Mylex RAID controlers, especially 960DPT and similar. I had only once an array failure with this controler due a hdd damage and I realized, that the Mylex driver in FreeBSD is very eloquent a way. it told me many things about what was wrong and what was happening. And I realized that there is a tool which is able to control the Mylex RAID controler. This week I installed a RAID V with the AMI MegaRAID Enterprise 1600 and just for fun I pulled out a case with one harddrive while running FreeBSD. The controler reacts on this with a wild beeping and beeping does not stop until the array has been rebuild or checked on consistency. But there was no message of any kind of error or drive failure or that the controler moans due some drive failures. Is this normal or is there a special way to check this? Another question regards to the way the controler acts with its harddrives. How can I figure out in which way the controler accesses its drives? Means: how to check whether Ultra2/160m, FAST, Wide/Ultra Wide or simply Ultra 16 Bit is used as protocol? The reason why I want to know this is explained in part two ... Second part. I tried to build up an RAID 5 array with eight IBM DDYS 36LXZ drives, each SCSI-3/160m capable. I use these drives in conjunction with the AMI MegaRAID Enterprise 1600 controler. These drives are fitted into metal hot plug capable cases, eight pieces, each of them is connected to the RAID controler via a 1.75m long Adaptec Ultra/160m special ribbon cable. The plugging technology is HD68, not SCA. The RAID controler delivers no TermPWR, it is configured as it is set by factory, so PCI delivers TermPWR. It is not possible to initialize, initiate or access a eight drive array in 160m mode and results are only then achieveable when forcing all drives delivering TermPWR and PCI not (against the convention!). I checked the drives, they are all right, I changed the controler, it's all right, I checked a bunch of cables, they're all right. I splitted the array into two parts, 4 drives at channel 0, the others at channel 1, but the results are more than confusing. It a book of horrors what I did and tried out to figure out how things work. The only way to force this configuration to work is to force each harddrive to work in SE mode, there is a jumper on it. Well, that means no 160m protocoll, that means owning a jet and driving it on a highway with 100 km/h, isn't it? I pretend that the way I try to attach the array to the controler is not the right way, but we obtained an expensive case but I do not have a SCA backplane for it, so I need to attach the drives by HD68. On the other hand: we spent a lot of money to obtain 9 IBM 36GB harddrives in HD68 technology, so: if the problem is highly depend on the way I attach the drives to the controler, is there a way to do this by HD68 equipment? Thanks a lot for your help. Maybe there is someone who's done this task, too. Please send any tip to the following address per email: [EMAIL PROTECTED] [EMAIL PROTECTED] because our main server is down between the years due maintanance. Thanks a lot, have a nice, new millenium ... Oliver To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-stable" in the body of the message
