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#1
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RAID-5 of 4x IBM IC35L073UCDY10 incompatible with SEAGATE ST373207LC
Hi,
I'm running a RAID-5 of 4x IBM IC35L073UCDY10 on an ICP Vortex GDT8514RZ SCSI/RAID-Controller, firmware 2.44.02-RC7B (current). It is to be expanded by 2 SEAGATE ST373207LC, but the expand command in the controller's console fails with the message "no suitable disks found". This seems to be due to a compatibility issue of the IBM drives. The IBM support doesn't seem to be of much help - the firmware update (S29A) they sent me made no difference. If anyone has experience with expanding RAID arrays of IBM disks or similar situations, please tell me... thx in advance -- Victor Mataré * Server- & Network-Administration * Lehrstuhl für Ingenieurgeologie und Hydrogeologie der RWTH-Aachen Lochnerstr. 4-20 52064 Aachen Germany http://www.lih.rwth-aachen.de Ph: +49-0241-80-97130 Fx: +49-0241-80-92280 |
#2
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John-Paul Stewart wrote:
Victor Mataré wrote: Hi, I'm running a RAID-5 of 4x IBM IC35L073UCDY10 on an ICP Vortex GDT8514RZ SCSI/RAID-Controller, firmware 2.44.02-RC7B (current). It is to be expanded by 2 SEAGATE ST373207LC, but the expand command in the controller's console fails with the message "no suitable disks found". This seems to be due to a compatibility issue of the IBM drives. The IBM support doesn't seem to be of much help - the firmware update (S29A) they sent me made no difference. If anyone has experience with expanding RAID arrays of IBM disks or similar situations, please tell me... Some RAID controllers simply refuse to work unless all drives are identical brand and model. I don't think it's a compatability issue with the IBM drives so much as it's an issue with the controller. Check with the controller manufacturer for information; there's a chance they might have a workaround (if this is indeed your problem). The controller definitely does support using different drives in a single array. It even leaves a "tolerance gap" of about 10 MB of unused space at the end of the disks to ensure that drives with a slightly smaller capacity can still be added to the array. I'm pretty sure it's an incompatibility issue with either the IBM- or the Seagate-disks. If this can't be resolved, I'd appreciate some tips on how to find out who (IBM, Seagate or maybe ICP Vortex) has been messing with the standards there, in order to find someone to "blame" for this thx4help, -- Victor Mataré * Server- & Network-Administration * Lehrstuhl für Ingenieurgeologie und Hydrogeologie der RWTH-Aachen Lochnerstr. 4-20 52064 Aachen Germany http://www.lih.rwth-aachen.de Ph: +49-0241-80-97130 Fx: +49-0241-80-92280 |
#3
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Victor Matare wrote:
John-Paul Stewart wrote: Victor Mataré wrote: Hi, I'm running a RAID-5 of 4x IBM IC35L073UCDY10 on an ICP Vortex GDT8514RZ SCSI/RAID-Controller, firmware 2.44.02-RC7B (current). It is to be expanded by 2 SEAGATE ST373207LC, but the expand command in the controller's console fails with the message "no suitable disks found". This seems to be due to a compatibility issue of the IBM drives. The IBM support doesn't seem to be of much help - the firmware update (S29A) they sent me made no difference. If anyone has experience with expanding RAID arrays of IBM disks or similar situations, please tell me... Some RAID controllers simply refuse to work unless all drives are identical brand and model. I don't think it's a compatability issue with the IBM drives so much as it's an issue with the controller. Check with the controller manufacturer for information; there's a chance they might have a workaround (if this is indeed your problem). The controller definitely does support using different drives in a single array. It even leaves a "tolerance gap" of about 10 MB of unused space at the end of the disks to ensure that drives with a slightly smaller capacity can still be added to the array. I'm pretty sure it's an incompatibility issue with either the IBM- or the Seagate-disks. If this can't be resolved, I'd appreciate some tips on how to find out who (IBM, Seagate or maybe ICP Vortex) has been messing with the standards there, in order to find someone to "blame" for this thx4help, Update: The guy who told me about that "tolerance gap" was wrong. I called ICP support and they said that if the disks being added are only a single sector smaller, the controller won't accept them. This seems to be the reason for my problem, as the Seagate drive are actually a few sectors shorter than the IBM drives. Tonight I'm gonna rebuild the whole array with slightly reduced sizes for the individual disks. If that doesn't work out, I'll post another call for help bye, -- Victor Mataré * Server- & Network-Administration * Lehrstuhl für Ingenieurgeologie und Hydrogeologie der RWTH-Aachen Lochnerstr. 4-20 52064 Aachen Germany http://www.lih.rwth-aachen.de Ph: +49-0241-80-97130 Fx: +49-0241-80-92280 |
#4
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Victor Matare wrote:
John-Paul Stewart wrote: Victor Mataré wrote: Hi, I'm running a RAID-5 of 4x IBM IC35L073UCDY10 on an ICP Vortex GDT8514RZ SCSI/RAID-Controller, firmware 2.44.02-RC7B (current). It is to be expanded by 2 SEAGATE ST373207LC, but the expand command in the controller's console fails with the message "no suitable disks found". This seems to be due to a compatibility issue of the IBM drives. The IBM support doesn't seem to be of much help - the firmware update (S29A) they sent me made no difference. If anyone has experience with expanding RAID arrays of IBM disks or similar situations, please tell me... Some RAID controllers simply refuse to work unless all drives are identical brand and model. I don't think it's a compatability issue with the IBM drives so much as it's an issue with the controller. Check with the controller manufacturer for information; there's a chance they might have a workaround (if this is indeed your problem). The controller definitely does support using different drives in a single array. It even leaves a "tolerance gap" of about 10 MB of unused space at the end of the disks to ensure that drives with a slightly smaller capacity can still be added to the array. I'm pretty sure it's an incompatibility issue with either the IBM- or the Seagate-disks. If this can't be resolved, I'd appreciate some tips on how to find out who (IBM, Seagate or maybe ICP Vortex) has been messing with the standards there, in order to find someone to "blame" for this thx4help, Update: The guy who told me about that "tolerance gap" was wrong. I called ICP support and they said that if the disks being added are only a single sector smaller, the controller won't accept them. This seems to be the reason for my problem, as the Seagate drive are actually a few sectors shorter than the IBM drives. Tonight I'm gonna rebuild the whole array with slightly reduced sizes for the individual disks. If that doesn't work out, I'll post another call for help bye, -- Victor Mataré * Server- & Network-Administration * Lehrstuhl für Ingenieurgeologie und Hydrogeologie der RWTH-Aachen Lochnerstr. 4-20 52064 Aachen Germany http://www.lih.rwth-aachen.de Ph: +49-0241-80-97130 Fx: +49-0241-80-92280 |
#5
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Victor Matare wrote:
It even leaves a "tolerance gap" of about 10 MB of unused space at the end of the disks to ensure that drives with a slightly smaller capacity can still be added to the array. But 10MB is not nearly enough. I have seen a difference of about 3.6GB between two drives both sold as 160GB. -- Kasper Dupont -- der bruger for meget tid på usenet. Note to self: Don't try to allocate 256000 pages with GFP_KERNEL on x86. |
#6
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In comp.sys.ibm.pc.hardware.storage Victor Mataré wrote:
Victor Matare wrote: John-Paul Stewart wrote: Victor Mataré wrote: Hi, I'm running a RAID-5 of 4x IBM IC35L073UCDY10 on an ICP Vortex GDT8514RZ SCSI/RAID-Controller, firmware 2.44.02-RC7B (current). It is to be expanded by 2 SEAGATE ST373207LC, but the expand command in the controller's console fails with the message "no suitable disks found". This seems to be due to a compatibility issue of the IBM drives. The IBM support doesn't seem to be of much help - the firmware update (S29A) they sent me made no difference. If anyone has experience with expanding RAID arrays of IBM disks or similar situations, please tell me... Some RAID controllers simply refuse to work unless all drives are identical brand and model. I don't think it's a compatability issue with the IBM drives so much as it's an issue with the controller. Check with the controller manufacturer for information; there's a chance they might have a workaround (if this is indeed your problem). The controller definitely does support using different drives in a single array. It even leaves a "tolerance gap" of about 10 MB of unused space at the end of the disks to ensure that drives with a slightly smaller capacity can still be added to the array. I'm pretty sure it's an incompatibility issue with either the IBM- or the Seagate-disks. If this can't be resolved, I'd appreciate some tips on how to find out who (IBM, Seagate or maybe ICP Vortex) has been messing with the standards there, in order to find someone to "blame" for this thx4help, Update: The guy who told me about that "tolerance gap" was wrong. I called ICP support and they said that if the disks being added are only a single sector smaller, the controller won't accept them. This seems to be the reason for my problem, as the Seagate drive are actually a few sectors shorter than the IBM drives. Tonight I'm gonna rebuild the whole array with slightly reduced sizes for the individual disks. If that doesn't work out, I'll post another call for help Having at least one of the seagates in there when you rebuild should reduce the size automatically. Arno |
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